The GCF of 6, 39, and 45 is 3.
The GCF is 39.
The GCF of 39 & 14 is 1.
The GCF of 78 and 117 is 39Factors of 78: 1 2 3 6 13 26 39 78Factors of 117: 1 3 9 13 39 117The GCF of 78 and 117 is: 39The GCF is 39.The GCF is 39.
The GCF is 3.
The GCF is 1
The GCF is 1.
The GCF is: 13
The GCF is 1.
The GCF is 3.
The GCF is 3.
Since prime factorizations are 6 = 2 * 3, and 39 = 3 * 13, we can easily see the biggest common factor of those 6 and 39 is 3.