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Excluding 1, they are : 2 , 3, 6, 14, 21, and 42.

42 = 2 x 3 x 7

84 = 2 x 2 x 3 x 7

the multiple factors are 2 x 7, 3 x 7, and 2 x 3 x 7 (which is 42).

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