The prime factorization of 18 is 2 x 3 x 3.
The prime factorization of 56 is 2 x 2 x 2 x7.
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56
whats continuous divisions of 56
2 x 2 x 2 x 7 = 56
its 36
The GCF of 14, 31, 39, and 56 is 1. One way to solve the problem is to notice that 31 is prime, and can't possibly be a factor of 14, which is smaller.If you prefer, you can write the prime factorization of each number in the set and find the GCF:The prime factorization of 14 is 2*7The prime factorization of 31 is 31 (1*31)The prime factorization of 39 is 3*39The prime factorization of 56 is 2*2*2*7So the GCF is 1.