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The greatest common factor of 220 and 520 is 20.

220: 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

520: 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520

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14y ago

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