The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42
The factors of 273 are: 1, 3, 7, 13, 21, 39, 91, 273
The common factors are: 1, 3, 7, 21
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The common factors of 22 and 42 are: 1 and 2
The common factors of 42 and 77 are: 1 and 7
The GCF of 42 and 86 is 2. One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them. The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 86 are 1, 2, 43, and 86. The common factors are 1 and 2. Therefore, the greatest common factor is 2.
The common factors of 42 and 56 are 1,2,7 and 14
The common factors of 42 and 60 are: 1, 2, 3, and 6