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Factors are numbers you can multiply together to get another number. Common factors are the factors two or more numbers have in common.

28: 1, 2, 4, 7, 14, 28

42: 1, 2, 3, 6, 7, 14, 21, 42

The common factors of 28 and 42 are 1, 2, 7 and 14.

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10y ago

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