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Anonymous
All factors of 243 are: -243, -81, -27, -9, -3, -1, 1, 3, 9, 27, 81, and 243.
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243 is a multiple of 1,7,21,81
729 = 3x3x3x3x3x3 so 3, 9, 27, 81, and 243 will all divide into 729 evenly.
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1, 2, 3, 6, 9, 18 go into 18 evenly.
the answer is 1 and 67