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| 21000: | 2 | 2 | 2 | 3 | 5 | 5 | 5 | 7 |
| 100: | 2 | 2 | 5 | 5 | ||||
| GCF: | 2 | 2 | 5 | 5 |
The Greates Common Factor (GCF) is: 2 x 2 x 5 x 5 = 100
| Greatest Common Factor (GCF) of 322 and 238 | | Greatest Common Factor (GCF) of 19 and 389 | | Greatest Common Factor (GCF) of 44 and 689 | | Greatest Common Factor (GCF) of 2563 and 5000 | | Greatest Common Factor (GCF) of 352 and 242 | | Greatest Common Factor (GCF) of 720 and 570 | | Greatest Common Factor (GCF) of 2380 and 1260 | | Greatest Common Factor (GCF) of 999 and 108 | | Greatest Common Factor (GCF) of 243 and 280 | | Greatest Common Factor (GCF) of 840 and 729 | | Greatest Common Factor (GCF) of 9009 and 7007 | | Greatest Common Factor (GCF) of 178 and 293 | | Greatest Common Factor (GCF) of 35 and 2100 | | Greatest Common Factor (GCF) of 1050 and 1000 | | Greatest Common Factor (GCF) of 110 and 152 | | Greatest Common Factor (GCF) of 3560 and 3405 | | Greatest Common Factor (GCF) of 4088 and 526 | | Greatest Common Factor (GCF) of 3330 and 3060 | | Greatest Common Factor (GCF) of 3562 and 3058 | | Greatest Common Factor (GCF) of 139 and 12 | | Greatest Common Factor (GCF) of 230 and 21 | | Greatest Common Factor (GCF) of 460 and 462 | | Greatest Common Factor (GCF) of 555 and 21 | | Greatest Common Factor (GCF) of 968 and 241 | | Greatest Common Factor (GCF) of 566 and 500 | | Greatest Common Factor (GCF) of 317 and 250 | | Greatest Common Factor (GCF) of 634 and 500 | | Greatest Common Factor (GCF) of 5936 and 55650 | | Greatest Common Factor (GCF) of 3180 and 25860 | | Greatest Common Factor (GCF) of 2756 and 32648 | | Greatest Common Factor (GCF) of 632 and 980 | | Greatest Common Factor (GCF) of 5832 and 143 |