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21 prime factorization

What is the prime factorization of 21?

Find the prime factorization of 21

The number 21 is written as

21 = 3 * 7

3 is a prime number.

7 is a prime number.

See Prime numbers 1 through 20.

Therefore, the prime factorization of 21 is

21 = 3 * 7

So, the prime factors of 21 are

3, 7