1, 2 and 4
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The common factors of 12 and 28 are 1, 2 and 4
The common factors are: 1, 2, 4, 5, 10, 20.
Factors of 28... 1,2,4,7,14,28 Factors of 44... 1,2,4,11,22,44 Common factors therefore are 1,2 & 4
The factors of 28 are:1, 2, 4, 7, 14, 28The factors of 78 are:1, 2, 3, 6, 13, 26, 39, 78The common factors are:1, 2The Greatest Common Factor (GCF) is: 2
Factors of 20:1,2,4,5,10,20Factors of 65:1,5,13,65The common factors are 1 and 5.