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The divisors of 21 are: 1, 3, 7, 21.

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Q: What are the divisors of the number 21?
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Related questions

What is the number of divisors for 105?

There are 8 divisors of 105 (viz: 1, 3, 5, 7, 15, 21, 35, 105)


Why 21 is not a perfect number?

First, you want to know the definition of a perfect number: A perfect number is an integer which is equal to the sum of all its positive integer divisors that are less than itself. Example: The positive integer divisors of 6, less than 6, are 1, 2, and 3. The sum of those divisors is 1 + 2 + 3 = 6. Therefore, 6 is a perfect number. Now, 21 does not meet this definition and therefore is not a perfect number. Let's try it. There are three positive divisors of 21, namely, 1, 3, and 7, that are less than 21, itself. (There are no others.) But the sum of these divisors is 1 + 3 + 7 = 11, which is not equal to 21. Therefore, we confirm that 21 is not a perfect number.


What is a defcient number?

It is a number for which the sum of the proper divisors is less the the number. Example: 21 has divisors 1, 3, and 7. The sum is 11 which is less than 21. Note: All prime numbers are deficient and as there are an infinite number of them, there are an infinite set of deficient numbers too.


What are the divisors of 21?

1,3,7, and 21


What are the divisors for the number 42?

1, 2, 3, 6, 7, 14, 21, 42.


How many divisors are there for the number 195?

There are eight divisors of the number 195.


What is the divisors of 21?

They are 1, 3, 7, 21.


What are the divisors of 147?

The divisors of 147 are 1, 3, 7, 21, 49, 147.


How many divisors does the number 23 have?

23 is a prime number. It has two divisors.


What number has exactly 10 divisors?

The first number to have exactly 10 divisors is 48.


What is a perfect Abundant Or dificient number?

A perfect number equals the sum of its proper divisors. A deficient number is greater than the sum of its proper divisors. An abundant number is less than the sum of its proper divisors. Proper divisors of a number do not include the number itself.


What number can go into number 735?

The divisors of 735 are 1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, and 735.


What is 16's Divisors?

2,4,8 (1 and 16 are divisors too, but the number and 1 are always divisors)


Are the factors of a number also divisors?

Yes, factors are divisors.


How many divisors does the number 231 have?

231 has 8 divisors.


How many divisors does 3240 have?

The number 3,240 has 40 divisors.


What number has nine divisors and is less than forty?

The number you are seeking is 36. The divisors are - 36,1,18,2,12,3,9,4,6.


Is the number 21 abundant or deficient or perfect?

It is deficient: It's only proper divisors are 1, 3, and 7, which sums to 11, which is less than 21.


What are two divisors of 293?

293 only has two divisors because it is a prime number. The divisors are 1 and 293.


What are th divisors of 42?

The divisors of 42 are 1, 2, 3, 6, 7, 14, 21, 42.


What number is one hundred divisors?

Any prime number to the 99th power has one hundred divisors.


What is the total number of different divisors of 7200?

7,200 has 54 different divisors.


What are the divisors of 29?

29 is a prime number and so its only divisors are 1 and 29.


What is the divisors of 5?

Because five is a prime number its only divisors are 1 and itself.


What are the divisors of 11?

Since 11 is a prime number, its only divisors are 1 and itself.