78
39,2
13,3,2
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78 6 x 13 (2x3) x 13 Since 2, 3, and 13 are prime numbers, the factor tree is complete.
Find out about factors and factor trees.
The greatest common factor of 78 and 546 is 78.
The greatest common factor of 12 and 78 is 6.
The greatest common factor of 78 and 120 is 6.