Greatest Common Factor Calculator

GCF of 12 and 18 = 6 GCF of 24 and 36 = 12 GCF of 48 and 64 = 16 GCF of 15 and 25 = 5 GCF of 30 and 45 = 15 GCF of 16 and 24 = 8 GCF of 20 and 30 = 10 GCF of 28 and 42 = 14 GCF of 36 and 60 = 12 GCF of 40 and 60 = 20 GCF of 18 and 27 = 9 GCF of 21 and 35 = 7 GCF of 14 and 21 = 7 GCF of 32 and 48 = 16 GCF of 45 and 75 = 15 GCF of 50 and 100 = 50 GCF of 60 and 90 = 30 GCF of 72 and 108 = 36 GCF of 84 and 126 = 42 GCF of 96 and 144 = 48 GCF of 8 and 12 = 4 GCF of 10 and 15 = 5 GCF of 12 and 20 = 4 GCF of 15 and 18 = 3 GCF of 18 and 24 = 6 GCF of 20 and 28 = 4 GCF of 24 and 32 = 8 GCF of 27 and 36 = 9 GCF of 35 and 49 = 7 GCF of 44 and 66 = 22 GCF of 52 and 78 = 26 GCF of 63 and 84 = 21 GCF of 70 and 105 = 35 GCF of 80 and 120 = 40 GCF of 90 and 135 = 45 GCF of 100 and 150 = 50 GCF of 110 and 165 = 55 GCF of 120 and 180 = 60 GCF of 9 and 27 = 9 GCF of 16 and 64 = 16 GCF of 25 and 75 = 25 GCF of 36 and 90 = 18 GCF of 48 and 120 = 24 GCF of 56 and 84 = 28 GCF of 60 and 120 = 60 GCF of 72 and 90 = 18 GCF of 80 and 100 = 20 GCF of 90 and 120 = 30 GCF of 100 and 200 = 100 GCF of 6 and 9 = 3