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| 1240: | 2 | 2 | 2 | 5 | 31 | |
| 580: | 2 | 2 | 5 | 29 | ||
| GCF: | 2 | 2 | 5 |
The Greates Common Factor (GCF) is: 2 x 2 x 5 = 20
| Greatest Common Factor (GCF) of 140 and 580 | | Greatest Common Factor (GCF) of 450 and 64 | | Greatest Common Factor (GCF) of 140 and 1240 | | Greatest Common Factor (GCF) of 600 and 512 | | Greatest Common Factor (GCF) of 50 and 29 | | Greatest Common Factor (GCF) of 17 and 130 | | Greatest Common Factor (GCF) of 648 and 1000 | | Greatest Common Factor (GCF) of 11 and 25 | | Greatest Common Factor (GCF) of 5145 and 315 | | Greatest Common Factor (GCF) of 56 and 71 | | Greatest Common Factor (GCF) of 49 and 23 | | Greatest Common Factor (GCF) of 486 and 63 | | Greatest Common Factor (GCF) of 157 and 600 | | Greatest Common Factor (GCF) of 58 and 145 | | Greatest Common Factor (GCF) of 9 and 630 | | Greatest Common Factor (GCF) of 81 and 729 | | Greatest Common Factor (GCF) of 81 and 1944 | | Greatest Common Factor (GCF) of 165 and 165 | | Greatest Common Factor (GCF) of 214 and 999 | | Greatest Common Factor (GCF) of 378 and 6 | | Greatest Common Factor (GCF) of 111 and 72 | | Greatest Common Factor (GCF) of 17 and 38 | | Greatest Common Factor (GCF) of 95 and 66 | | Greatest Common Factor (GCF) of 64 and 512 | | Greatest Common Factor (GCF) of 800 and 339 | | Greatest Common Factor (GCF) of 15 and 147 | | Greatest Common Factor (GCF) of 62 and 6 | | Greatest Common Factor (GCF) of 154 and 11 | | Greatest Common Factor (GCF) of 126 and 112 | | Greatest Common Factor (GCF) of 54 and 67 | | Greatest Common Factor (GCF) of 159 and 16 | | Greatest Common Factor (GCF) of 82 and 13 |