The GCF of 54, 72, and 81 is 9.
The prime factorization of 54 is 2*3*3*3
The prime factorization of 72 is 2*2*2*3*3
The prime factorization of 81 is 3*3*3*3
The GCF, then, is 3*3 = 9
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The Greatest Common Factor is 6
The GCF is 6.
12
The greatest common factor of 24 54 and 72 is 6.
6