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The GCF of 26, 39, and 65 is 13.

A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common.

One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.

The factors of 26 are 1, 2, 13, and 26.

The factors of 39 are 1, 3, 13, and 39.

The factors of 65 are 1, 5, 13, and 65.

The common factors are 1 and 13. Therefore, the greatest common factor is 13.

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Q: What is the greatest common factor of 26 39 and 65?
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