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| 100: | 2 | 2 | 5 | 5 | |
| 220: | 2 | 2 | 5 | 11 | |
| GCF: | 2 | 2 | 5 |
The Greates Common Factor (GCF) is: 2 x 2 x 5 = 20
| Greatest Common Factor (GCF) of 39 and 64 | | Greatest Common Factor (GCF) of 156 and 256 | | Greatest Common Factor (GCF) of 65 and 27 | | Greatest Common Factor (GCF) of 286 and 451 | | Greatest Common Factor (GCF) of 136 and 276 | | Greatest Common Factor (GCF) of 3696 and 336 | | Greatest Common Factor (GCF) of 48 and 77 | | Greatest Common Factor (GCF) of 539 and 336 | | Greatest Common Factor (GCF) of 25872 and 3252 | | Greatest Common Factor (GCF) of 9261 and 28 | | Greatest Common Factor (GCF) of 35 and 142 | | Greatest Common Factor (GCF) of 9 and 374 | | Greatest Common Factor (GCF) of 66 and 51 | | Greatest Common Factor (GCF) of 165 and 288 | | Greatest Common Factor (GCF) of 9 and 255 | | Greatest Common Factor (GCF) of 431 and 5732 | | Greatest Common Factor (GCF) of 75 and 38 | | Greatest Common Factor (GCF) of 126 and 65 | | Greatest Common Factor (GCF) of 74 and 186 | | Greatest Common Factor (GCF) of 148 and 372 | | Greatest Common Factor (GCF) of 825 and 1155 | | Greatest Common Factor (GCF) of 378 and 61 | | Greatest Common Factor (GCF) of 18 and 113 | | Greatest Common Factor (GCF) of 36 and 226 | | Greatest Common Factor (GCF) of 88 and 126 | | Greatest Common Factor (GCF) of 750 and 280 | | Greatest Common Factor (GCF) of 126 and 340 | | Greatest Common Factor (GCF) of 15 and 250 | | Greatest Common Factor (GCF) of 448 and 56 | | Greatest Common Factor (GCF) of 108 and 352 | | Greatest Common Factor (GCF) of 12 and 256 | | Greatest Common Factor (GCF) of 247 and 20 |