The factor pairs of 27 are 1x27 and 3x9.
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Yes. Factor pairs are always repeated across pairs since factor pairs are certain kinds of pairs.
The factor pairs of 14 are 1*14, and 2*7
1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.
There are 2 factor pairs of 26.26 = 1 x 2626 = 2 x 13
Number of factor pairs = number of rectangles