Prime Factorization of 24 and 56 Prime factorization of 24 is: 2 X 12 2 X 2 X 6 2 X 2 X 2 X 3 The prime factorization of 56 is: 2 X 28 2 X 2 X 14 2 X 2 X 2 X 7

The GCF of 36, 45, and 56 is 1. The prime factorization of 36 is 2*2*3*3 The prime factorization of 45 is 3*3*5 The prime factorization of 56 is 2*2*2*7 Thus, the only common factor of the set is 1.