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The factors of 45 are: 1, 3, 5, 9, 15, 45

The factors of 306 are: 1, 2, 3, 6, 9, 17, 18, 34, 51, 102, 153, 306

The common factors are: 1, 3, 9

The Greatest Common Factor: GCF = 9

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9y ago

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