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| 21: | 3 | 7 | |
| 51: | 3 | 17 | |
| GCF: | 3 |
The Greates Common Factor (GCF) is: 3
| Greatest Common Factor (GCF) of 240 and 2700 | | Greatest Common Factor (GCF) of 36 and 96 | | Greatest Common Factor (GCF) of 18 and 99 | | Greatest Common Factor (GCF) of 28 and 35 | | Greatest Common Factor (GCF) of 48 and 108 | | Greatest Common Factor (GCF) of 493 and 15 | | Greatest Common Factor (GCF) of 16 and 68 | | Greatest Common Factor (GCF) of 56 and 136 | | Greatest Common Factor (GCF) of 40 and 80 | | Greatest Common Factor (GCF) of 63 and 84 | | Greatest Common Factor (GCF) of 48 and 21 | | Greatest Common Factor (GCF) of 210 and 240 | | Greatest Common Factor (GCF) of 136 and 245 | | Greatest Common Factor (GCF) of 34 and 70 | | Greatest Common Factor (GCF) of 6 and 48 | | Greatest Common Factor (GCF) of 63 and 70 | | Greatest Common Factor (GCF) of 126 and 441 | | Greatest Common Factor (GCF) of 48 and 420 | | Greatest Common Factor (GCF) of 6 and 27 | | Greatest Common Factor (GCF) of 213 and 522 | | Greatest Common Factor (GCF) of 10 and 56 | | Greatest Common Factor (GCF) of 24 and 52 | | Greatest Common Factor (GCF) of 300 and 71 | | Greatest Common Factor (GCF) of 9 and 72 | | Greatest Common Factor (GCF) of 16 and 60 | | Greatest Common Factor (GCF) of 144 and 252 | | Greatest Common Factor (GCF) of 342 and 252 | | Greatest Common Factor (GCF) of 36 and 168 | | Greatest Common Factor (GCF) of 42 and 48 | | Greatest Common Factor (GCF) of 75 and 135 | | Greatest Common Factor (GCF) of 22 and 44 | | Greatest Common Factor (GCF) of 420 and 90 |