1 is the highest common factor. 27 is 3 x 3 x 3. 91 is 7 x 13. So there are no common factors other than 1.
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It is: 1
1 is the highest common factor of 91 and 251.
The highest common factor is 7.
The highest common factor of the numbers 28, 84 and 91 is 7.
The highest common factor of the numbers 91, 156 and 169 is 13.
The highest factor of any positive integer is the integer itself. The highest common factor of 91 and 203 is 7.
The Greatest Common Factor (GCF) is: 13
13
7
It is: 13
91
It is 7