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The factors of 280 are:

1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280

The factors of 420 are:

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420

The common factors are:

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140

The Greatest Common Factor:

GCF = 140

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9y ago

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