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| 20: | 2 | 2 | 5 | ||
| 21: | 3 | 7 | |||
| GCF: |
The Greates Common Factor (GCF) is: 1
| Greatest Common Factor (GCF) of 21 and 15 | | Greatest Common Factor (GCF) of 24 and 14 | | Greatest Common Factor (GCF) of 24 and 8 | | Greatest Common Factor (GCF) of 9 and 16 | | Greatest Common Factor (GCF) of 23 and 10 | | Greatest Common Factor (GCF) of 147 and 98 | | Greatest Common Factor (GCF) of 144 and 80 | | Greatest Common Factor (GCF) of 34 and 36 | | Greatest Common Factor (GCF) of 16 and 4 | | Greatest Common Factor (GCF) of 36 and 72 | | Greatest Common Factor (GCF) of 40 and 10 | | Greatest Common Factor (GCF) of 99 and 260 | | Greatest Common Factor (GCF) of 8 and 51 | | Greatest Common Factor (GCF) of 60 and 100 | | Greatest Common Factor (GCF) of 52 and 495 | | Greatest Common Factor (GCF) of 252 and 143 | | Greatest Common Factor (GCF) of 240 and 150 | | Greatest Common Factor (GCF) of 156 and 676 | | Greatest Common Factor (GCF) of 27 and 26 | | Greatest Common Factor (GCF) of 14 and 10 | | Greatest Common Factor (GCF) of 24 and 64 | | Greatest Common Factor (GCF) of 56 and 42 | | Greatest Common Factor (GCF) of 81 and 135 | | Greatest Common Factor (GCF) of 54 and 108 | | Greatest Common Factor (GCF) of 14 and 48 | | Greatest Common Factor (GCF) of 13 and 40 | | Greatest Common Factor (GCF) of 8 and 35 | | Greatest Common Factor (GCF) of 24 and 7 | | Greatest Common Factor (GCF) of 125 and 358 | | Greatest Common Factor (GCF) of 7 and 6 | | Greatest Common Factor (GCF) of 15 and 9 | | Greatest Common Factor (GCF) of 49 and 63 |