44 = 22 x 11
63 = 32 x 7
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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.
The prime factorisation of 42 is 2*3*7.
The prime factorization of 42 is 2 x 3 x 7.2 x 3 x 7 = 422 x 3 x 7 = 42
The GCF of 12, 24, and 39 is 3.The prime factorization of 12 is 2*2*3The prime factorization of 24 is 2*2*2*3The prime factorization of 39 is 3*13So the GCF of 12, 24, and 39 is 3.