1 x 686
2 x 343
7 x 98
14 x 49
The HCF of 686 is 686. But it's a factor as opposed to a common factor because there's only one number.
686 343,2 49,7,2 7,7,7,2
686 343,2 49,7,2 7,7,7,2
Yes. Factor pairs are always repeated across pairs since factor pairs are certain kinds of pairs.
The GCF is 2.
The factor pairs of 28 are :28,114,27,4
the factor pairs are 1x35 & 5x7
Sixteen factor pairs.
The factor pairs of 27 are 1x27 and 3x9.
The factor pairs of 57 are 3x19 and 1x57
its a factor with two pairs of the same number
Mathematicians call them "factor pairs."