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The GCF is 3.
The factors of 2 are 1, and 2
1,3,7,21
1,2,5,10
Every number has factors. They are endless.
2x3x5
1, 37.
The factors of 81 are 1, 3, 9, 27, and 81.
3 and 5.
2 and 3
1,2,3,4,6,8,12,24 1,2,4,7,8,14,28,56
They are: 1, 5 and 25