Because 21 is the largest number that divides evenly into both of those numbers with no remainder.
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The greatest common factor of 105 and 147 is 21
The greatest common factor of 84 and 105 is 21.
The greatest common factor of 63, 84, and 105 is 21.
The greatest common factor of 105, 126, and 210 is 21
3The GCF is: 2121.The GCF is 21.
Answer: 21
21
The GCF is 21.
The GCF is 21.
The GCF is 21.
The GCF is 21.
The Greatest Common Factor is 21