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The factors of 28 are:

1, 2, 4, 7, 14, 28

The factors of 42 are:

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

The factors of 84 are:

1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84

The common factors are: 1, 2, 7, 14

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14y ago

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