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The greatest common factor is the highest number that divides exactly into two or more numbers.

13: 1, 13

39: 1, 3, 13, 39

The GCF for 13 and 39 is 13.

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8y ago
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7y ago

Since 13 is a factor of 39, it is automatically the GCF.

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Q: What is the greatest common factor of 13 and 39?
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