39∣3 13∣13 1 39 = 3 ∗ 13 65∣5 13∣13 1 65 = 5 ∗ 13 G . C . F ( 39 ; 65 ) = 13
13 x 3 = 39 13 x 5 = 65 The GCF is 13
The greatest common factor of 39 and 65 is 13, which can be found by using prime factorization. Both numbers share the prime factor 13. Therefore, 13 is the GCF.
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