1 x 7, 7 x 1
1 and 7
The factor pairs of 14 are 1*14, and 2*7
14 = 1*14, 2*7 14 = 1 x 14 ( 1st factor pairs) = 2 x 7 (2nd factor pairs
1 and 7
The factor pairs of 28 are 1*28, 2*14, and 4*7
1 and 7
Factors of 21 are 1, 3, 7, and 21; the factor pairs are (1 x 21) and (3 x 7).
100 and 7
The factor pairs of 112 are 1*112, 2*56, 4*28, 7*16, and 8*14
There are two factor pairs of 21: 21 = 1 x 21 21 = 3 x 7
There are three factor pairs:63 = 1 x 6363 = 3 x 2163 = 7 x 9
The factor pairs of 56 are: 1, 56; 2, 28; 4, 14; 7, 8 Therefore, if you exclude itself and 1, there are three factor pairs, but if you include itself and 1, there are four factor pairs.