Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
Factors of 819: 1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819
GCF (40, 819) = 1
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it is 40 because it is the greatest common factor for the numbers10 and 40
The greatest common factor of 1628 , 40 = 4
The Greatest Common Factor of 40 and 18 is 2.
The GCF is 4.
The Greatest Common Factor of 40 and 250 is 10.