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Q: Which number between 21 and 40 has the most factors?

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21

A composite number is a number that has more than two factors. The factors of 21 are 1, 3, 7, and 21. Therefore, 21 is a composite number.

The number 21 would be the answer. 19 and 23 only have two factors, 1 and themselves, as they are prime numbers. 25 only has 1, 25 and 5. 21 has 1, 21, 3 and 7 for 4 possible factors.

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The factors for the number 63 are 1, 3, 7, 9, 21, and 63.

Related questions

21

21 does.

which of the numbers 19 21 23 and 25 has the most factors

24 does.

The factors of 21 are :1,3,7,21

A composite number is a number that has more than two factors. The factors of 21 are 1, 3, 7, and 21. Therefore, 21 is a composite number.

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

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

4 factors they are 1,3,7 and 21

A composite number is a number that has more than two factors. The factors of 21 are 1, 3, 7, and 21. Therefore, 21 is a composite number.

No, it is not possible. Every multiple of 21 is a composite number. 21 is a composite number and its factors are 1, 3, 7 and 21(4 factors). Any multiple of 21 must have all the factors of 21. So, every multiple of 21 has at least 4 factors. And a prime number has only two factors so, any multiple of 21 can't be prime.

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