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What is the divisors of 21?

Updated: 8/29/2023

Wiki User

8y ago

231 has 8 divisors.

Wiki User

10y ago
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A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

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Wiki User

8y ago

They are 1, 3, 7, 21.

Wiki User

7y ago

3 x 7 x 11

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Q: What is the divisors of 21?
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What are the divisors of the number 21?

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

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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 are the divisors of 42?

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

What are the divisors for 42?

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