As a product of its prime factors: 2 times 19 = 38
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1 is the greatest and only common factor of 15 and 38. The prime factorization of 15 is 3*5. The prime factorization of 38 is 2*19
The greatest common factor of 38 and 57 is 19. The prime factorization of 38 is 2*19 The prime factorization of 57 is 3*19 So the GCF is 19.
1, 2, 3, 6, 19, 38, 57, 114
The greatest common factor of 38 and 92 is 2.
The greatest common factor is 2