If it's not what You are looking for type in the calculator fields your own values, and You will get the solution.

To find the greatest common factor of two numbers just type them in and get the solution.

To get the Greates Common Factor (GCF) of 21 and 306 we need to factor each value first and then we choose all the copies of factors and multiply them:

21: | 3 | 7 | |||

306: | 2 | 3 | 3 | 17 | |

GCF: | 3 |

**The Greates Common Factor (GCF) is: 3**

| Greatest Common Factor (GCF) of 152 and 64 | | Greatest Common Factor (GCF) of 84 and 23 | | Greatest Common Factor (GCF) of 31 and 2 | | Greatest Common Factor (GCF) of 32 and 5 | | Greatest Common Factor (GCF) of 89 and 3 | | Greatest Common Factor (GCF) of 65 and 4 | | Greatest Common Factor (GCF) of 715 and 1001 | | Greatest Common Factor (GCF) of 42 and 60 | | Greatest Common Factor (GCF) of 90 and 25 | | Greatest Common Factor (GCF) of 84 and 92 | | Greatest Common Factor (GCF) of 8 and 1000 | | Greatest Common Factor (GCF) of 74 and 100 | | Greatest Common Factor (GCF) of 323 and 391 | | Greatest Common Factor (GCF) of 15 and 55 | | Greatest Common Factor (GCF) of 165 and 297 | | Greatest Common Factor (GCF) of 12 and 90 | | Greatest Common Factor (GCF) of 80 and 32 | | Greatest Common Factor (GCF) of 6 and 45 | | Greatest Common Factor (GCF) of 36 and 20 | | Greatest Common Factor (GCF) of 73 and 70 | | Greatest Common Factor (GCF) of 73 and 9 | | Greatest Common Factor (GCF) of 29 and 3 | | Greatest Common Factor (GCF) of 29 and 15 | | Greatest Common Factor (GCF) of 30 and 87 | | Greatest Common Factor (GCF) of 43 and 60 | | Greatest Common Factor (GCF) of 30 and 14 | | Greatest Common Factor (GCF) of 1000 and 2 | | Greatest Common Factor (GCF) of 91 and 15 | | Greatest Common Factor (GCF) of 84 and 36 | | Greatest Common Factor (GCF) of 66 and 41 | | Greatest Common Factor (GCF) of 4 and 60 | | Greatest Common Factor (GCF) of 40 and 86 | | Greatest Common Factor (GCF) of 35 and 77 | | Greatest Common Factor (GCF) of 38 and 45 | | Greatest Common Factor (GCF) of 51 and 91 | | Greatest Common Factor (GCF) of 12 and 500 | | Greatest Common Factor (GCF) of 160 and 900 | | Greatest Common Factor (GCF) of 29 and 87 | | Greatest Common Factor (GCF) of 65 and 39 | | Greatest Common Factor (GCF) of 63 and 135 | | Greatest Common Factor (GCF) of 88 and 240 | | Greatest Common Factor (GCF) of 212 and 312 | | Greatest Common Factor (GCF) of 42 and 184 | | Greatest Common Factor (GCF) of 77280 and 8400 | | Greatest Common Factor (GCF) of 91 and 26 | | Greatest Common Factor (GCF) of 43 and 61 | | Greatest Common Factor (GCF) of 61 and 90 | | Greatest Common Factor (GCF) of 13 and 10 | | Greatest Common Factor (GCF) of 28 and 65 | | Greatest Common Factor (GCF) of 54 and 16 | | Greatest Common Factor (GCF) of 54 and 63 | | Greatest Common Factor (GCF) of 20 and 17 | | Greatest Common Factor (GCF) of 91 and 75 | | Greatest Common Factor (GCF) of 55 and 275 | | Greatest Common Factor (GCF) of 14 and 280 | | Greatest Common Factor (GCF) of 125 and 38 | | Greatest Common Factor (GCF) of 1575 and 1029 | | Greatest Common Factor (GCF) of 110 and 120 | | Greatest Common Factor (GCF) of 900 and 40 | | Greatest Common Factor (GCF) of 32 and 224 | | Greatest Common Factor (GCF) of 78 and 27 | | Greatest Common Factor (GCF) of 56 and 32 | | Greatest Common Factor (GCF) of 27 and 95 | | Greatest Common Factor (GCF) of 110 and 55 | | Greatest Common Factor (GCF) of 240 and 360 |

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