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81: 1,3,9,27,81
65: 1,5,13,65
GCF: 1
The GCF of 6 and 81 is 3.
The GCF is 9.
27 and 81, respectively.
The GCF is 1.
The GCF is 1
gcf of 37 and 81 is 1.
The GCF of 27 and 81 is 27. And their LCM is 81.
The GCF is 27.
The GCF is 2.