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No. The only factors of a Prime number are 1 and itself. The only way that 21 could be a factor of a prime number is if it were a prime number, but it is not because 21 is also divisible by 3 and 7.

Q: Is 21 a factor of a prime number?

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If 21 is a multiple of the number, the number cannot have 90 as a factor.

3 and 7

3 and 7

1, 3, 7, 9, 21, 63 3 and 7 are prime.

no

Related questions

3 is a prime factor of 12 and of 21.

If 21 is a multiple of the number, the number cannot have 90 as a factor.

21 is not a prime factor, it is 3 x 7

21 = 3 x 7 both 3 and 7 are prime numbers

3

3 and 7

7

They are: 3 and 7

3 and 7

prime factor = prime number which can be divided into the given number with no remainder The prime factors of 21 are 3 and 7.

3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.

3 x 7 = 21