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| 640: | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 5 | |
| 120: | 2 | 2 | 2 | 3 | 5 | ||||
| GCF: | 2 | 2 | 2 | 5 |
The Greates Common Factor (GCF) is: 2 x 2 x 2 x 5 = 40
| Greatest Common Factor (GCF) of 122 and 274 | | Greatest Common Factor (GCF) of 405 and 300 | | Greatest Common Factor (GCF) of 2187 and 891 | | Greatest Common Factor (GCF) of 13 and 644 | | Greatest Common Factor (GCF) of 1264 and 1000 | | Greatest Common Factor (GCF) of 116 and 164 | | Greatest Common Factor (GCF) of 284 and 104 | | Greatest Common Factor (GCF) of 2520 and 10 | | Greatest Common Factor (GCF) of 650 and 1300 | | Greatest Common Factor (GCF) of 12535 and 50 | | Greatest Common Factor (GCF) of 500 and 1750 | | Greatest Common Factor (GCF) of 6144 and 8019 | | Greatest Common Factor (GCF) of 2000 and 60000 | | Greatest Common Factor (GCF) of 77777 and 9 | | Greatest Common Factor (GCF) of 359 and 990 | | Greatest Common Factor (GCF) of 243 and 157 | | Greatest Common Factor (GCF) of 136 and 165 | | Greatest Common Factor (GCF) of 104 and 500 | | Greatest Common Factor (GCF) of 315 and 226 | | Greatest Common Factor (GCF) of 3402 and 23814 | | Greatest Common Factor (GCF) of 360 and 1620 | | Greatest Common Factor (GCF) of 35112 and 35 | | Greatest Common Factor (GCF) of 105 and 169 | | Greatest Common Factor (GCF) of 2964 and 624 | | Greatest Common Factor (GCF) of 1296 and 49 | | Greatest Common Factor (GCF) of 1794 and 234 | | Greatest Common Factor (GCF) of 1067 and 26 | | Greatest Common Factor (GCF) of 293 and 586 | | Greatest Common Factor (GCF) of 400 and 302 | | Greatest Common Factor (GCF) of 8262 and 17 | | Greatest Common Factor (GCF) of 301 and 462 | | Greatest Common Factor (GCF) of 161 and 63 |