2 x 3 x 7 = 42
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1, 3, 5, 15 3 and 5 are prime.
21 isn't prime. The prime factorization of 42 is 2 x 3 x 7.
The prime factors of 42 are 2, 3 and 7.
42 - The prime factors are: 2, 3 and 7660 - The prime factors are: 2, 3, 5 and 11
The prime factorisation of 42 is 2*3*7.