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They are 1, 3, 7, 21.

3 x 7 x 11

Q: What is the divisors of 21?

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Eight. The odd divisors of 756 are: 1, 3, 7, 9, 21, 27, 63, 189.

The divisors of 101 are: 1, 101.

2,835 has 20 divisors.

120,000 has 70 proper divisors.

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

Related questions

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

The divisors of 63 are: 1, 3, 7, 9, 21, 63.

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

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

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

The divisors of 126 are: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126.

Eight. The odd divisors of 756 are: 1, 3, 7, 9, 21, 27, 63, 189.

1, 3, 7, 9, 21, 63.

The single-digit divisors of 3,456 are: 1, 2, 3, 4, 6, 8 and 9.

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.

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

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