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| 640: | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | ||
| 720: | 2 | 2 | 2 | 2 | 3 | 3 | 5 | |||
| GCF: | 2 | 2 | 2 | 2 | 5 |
The Greates Common Factor (GCF) is: 2 x 2 x 2 x 2 x 5 = 80
| Greatest Common Factor (GCF) of 81 and 28 | | Greatest Common Factor (GCF) of 345 and 8 | | Greatest Common Factor (GCF) of 500 and 28 | | Greatest Common Factor (GCF) of 100 and 336 | | Greatest Common Factor (GCF) of 800 and 3000 | | Greatest Common Factor (GCF) of 63 and 79 | | Greatest Common Factor (GCF) of 124 and 248 | | Greatest Common Factor (GCF) of 59 and 5 | | Greatest Common Factor (GCF) of 18 and 169 | | Greatest Common Factor (GCF) of 29 and 89 | | Greatest Common Factor (GCF) of 200 and 466 | | Greatest Common Factor (GCF) of 1170 and 6171 | | Greatest Common Factor (GCF) of 1848 and 924 | | Greatest Common Factor (GCF) of 1001 and 3630 | | Greatest Common Factor (GCF) of 1078 and 625 | | Greatest Common Factor (GCF) of 2310 and 693 | | Greatest Common Factor (GCF) of 2970 and 163800 | | Greatest Common Factor (GCF) of 3 and 26 | | Greatest Common Factor (GCF) of 121 and 16 | | Greatest Common Factor (GCF) of 1410 and 448 | | Greatest Common Factor (GCF) of 1627 and 448 | | Greatest Common Factor (GCF) of 117 and 69 | | Greatest Common Factor (GCF) of 216 and 512 | | Greatest Common Factor (GCF) of 4144 and 999 | | Greatest Common Factor (GCF) of 133 and 168 | | Greatest Common Factor (GCF) of 250 and 250 | | Greatest Common Factor (GCF) of 108 and 128 | | Greatest Common Factor (GCF) of 96 and 369 | | Greatest Common Factor (GCF) of 1080 and 1200 | | Greatest Common Factor (GCF) of 360 and 297 | | Greatest Common Factor (GCF) of 168 and 83 | | Greatest Common Factor (GCF) of 110 and 754 |