What number has exactly 5 factors?
Explanation: The only two numbers in the range (1, 100) having exactly 5 prime factors are 16 and 81.
What are the factors of 1 and 20?
Table of Factors and Multiples
| Factors | Multiples | |
|---|---|---|
| 1, 2, 3, 6, 9, 18 | 18 | 126 |
| 1, 19 | 19 | 133 |
| 1, 2, 4, 5, 10, 20 | 20 | 140 |
| 1, 3, 7, 21 | 21 | 147 |
How many factors has 5?
two factors Factors of 5 are the natural numbers that can divide the actual number, evenly. 5 is the third prime number when arranged in ascending order. Therefore, 5 will have only two factors, 1 and 5. If we divide 5 by any other integer, then the remainder will be a non-zero positive integer.
What are the factors of 20?
Factors of 20: 1, 2, 4, 5, 10 and 20.
Which is the smallest number that has 5 factors?
16, 81, 625, 2401, 14641… 16 is the smallest number with exactly 5 divisors. 12 is the smallest number with at least 5 proper divisors. 2310 is the smallest number with five distinct prime factors.
What is a composite number with 5 factors?
2 is prime. Example 2: Is the number 9 prime or composite? Solution: The factors of 9 are 1 x 9, 3 x 3. 9 is composite….Definitions.
| factors of 2: | 1 x 2 | 2 is prime |
|---|---|---|
| factors of 4: | 1 x 4, 2 x 2 | 4 is composite |
| factors of 5: | 1 x 5 | 5 is prime |
| factors of 6: | 1 x 6, 2 x 3 | 6 is composite |
| factors of 7: | 1 x 7 | 7 is prime |
What’s the multiples of 5?
The multiples of 5 include 5, 10, 15, 20, 25, 30, 35, 40,…. The multiples of 10 include 10, 20, 30, 40, 50, 60,…. Thus, the common multiples of 5 and 10 are 10, 20, 30, 40,…. That means all the multiples of 10 will be the common multiples for 5 and 10.
What is the LCM of 1 and 20?
20 The LCM of 1 and 20 is 20.
What does a factor of 5 mean?
if something increases by a factor of 5, 10, 20 etc, it becomes 5, 10, 20 etc times larger.
What are multiples of 5?
The multiples of 5 include 5, 10, 15, 20, 25, 30, 35, 40,…. The multiples of 10 include 10, 20, 30, 40, 50, 60,….
What are the first 5 multiples of 20?
The first 10 multiples of 20 are 20, 40, 60, 80, 100, 120, 140, 160, 180, and 200.
How do you factor numbers?
How to Find Factors of a Number?
- Find all the numbers less than or equal to the given number.
- Divide the given number by each of the numbers.
- The divisors that give the remainder to be 0 are the factors of the number.
Is the smallest number that has 5 factors How many factors does n 1 have?
1 Answer. A number that has 5 factors has to be of the form x^4 where 'x' is a prime number. Therefore, N − 1 = 15.
What is the smallest two digit number with exactly 5 unique factors?
The smallest number is 256, with factors 1, 2, 4, 8, 16, 32, 64, 128, 256. The smallest is 36 with factors 1, 2, 3, 4, 6, 9, 12, 18, 36. So the answer is 36. If you want proper factors (excluding the number itself) the answer is 48, and I gave you the formula to calculate this.
Which is the smallest number with exactly five factors?
16 is the smallest number with exactly 5 divisors.
Which two numbers must be factors of all numbers whose last digit is 5?
| A number is divisible by | Condition |
|---|---|
| 2 | The last digit is even (0, 2, 4, 6, 8). |
| 3 | The sum of the digits is divisible by 3. |
| 4 | The last two digits form a number that is divisible by 4. |
| 5 | The last digit is 0 or 5. |
What are the multiples of 20?
The first 10 multiples of 20 are 20, 40, 60, 80, 100, 120, 140, 160, 180, and 200.
What are first multiple of 5?
The multiples of 5 include 5, 10, 15, 20, 25, 30, 35, 40,…. The multiples of 10 include 10, 20, 30, 40, 50, 60,….
What is the LCM of 120 and 5?
120 The LCM of 5 and 120 is 120.
What is the LCM of 1?
We would normally define the least common multiple as the smallest positive integer that is a multiple of those under consideration, thus the lcm{1,-1} is 1.
Which of these are not a factor of 20?
The factors of 20 are 1, 2, 4, 5, 10, 20 and its negative factors are -1, -2, -4, -5, -10, -20.
What is a factor pair of 5?
1 and 5 Factors of 5 in Pairs Positive factors of 5 : 1 and 5.
How do you find the first 5 multiples of a number?
0:525:01How to write first 5 multiples – YouTubeYouTube
What are the first 5 multiples of 1?
Here is a list of the first 20 multiples of the integers 1 through 20.
- Multiples of 1: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20.
- Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40.
How many prime numbers are there between 1 and 20?
8 prime numbers There are 8 prime numbers under 20: 2, 3, 5, 7, 11, 13, 17 and 19. The first 10 prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.
Which numbers are the factors?
Factors are whole numbers that are multiplied together to produce another number. The original numbers are factors of the product number. If a x b = c then a and b are factors of c. Say you wanted to find the factors of 16.
What’s the smallest number with 5 factors?
Answer: 16, 81, 625, 2401, 14641… 16 is the smallest number with exactly 5 divisors.
What is the lowest number with 5 factors?
Answer: The smallest composite number that has the five smallest prime numbers as factors is 2310.
How many 2 digit integers have exactly 5 divisors?
Since 5 is a prime number, it cannot be the product of two integers greater than 1, which implies that a number having 5 factors must be of a form of (prime)^4 –> the number of factors = (4 + 1). There are only 2 two-digit numbers which can be written this way: 2^4 = 16 and 3^4 = 81. Answer: C.
How do you find factors easily?
1:005:44How to find ALL the factors of ANY number… FAST! (by … – YouTubeYouTube