# Greatest Common Factor (GCF) of 8640 and 945

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To get the Greates Common Factor (GCF) of 8640 and 945 we need to factor each value first and then we choose all the copies of factors and multiply them:

 8640: 2 2 2 2 2 2 3 3 3 5 945: 3 3 3 5 7 GCF: 3 3 3 5

The Greates Common Factor (GCF) is: 3 x 3 x 3 x 5 = 135

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