The GCF is: 1
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The Greatest Common Divisor of 15, 78 is 3.
The greatest common factor of 120 and 245 is 5.
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 GCF is 1.
The GCF is 1.