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The GCF is 13.
The factors of 52 are:

1, 2, 4, 13, 26, 52

The factors of 78 are:

1, 2, 3, 6, 13, 26, 39, 78

The factors of 91 are:

1, 7, 13, 91

The factors of 117 are:

1, 3, 9, 13, 39, 117

The common factors are:

1, 13

The Greatest Common Factor (GCF) is:

13

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8y ago

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