Since 5 is a factor of 220, it is automatically the GCF.
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The greatest common factor of 220 and 520 is 20.220: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220520: 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
The factors of 5 are: 1, and 5The factors of 10 are: 1, 5, and 10The factors common to 5 and 10 are: 1, and 5The greatest common factor is 5.
The greatest common factor (GCF) is: 5.
The greatest common factor (GCF) is 5.
5 is the greatest common factor