1x6, 2x3
(16,1)(8,2)(4,4)
The factor pairs of 18 are (1 x 18), (2 x 9), (3 x 6)
... what are the factor family of 6
60, 72, 84, 90 and 96 have 6 factor pairs.
Factor pairs of 42 are 1 x 42, 2 x 21, 3 x 14, and 6 x 7.
All numbers have factors. It is possible to list them as pairs. The factors of 12 are 1, 2, 3, 4, 6 and 12. The factor pairs of 12 are (12,1)(6,2)(4,3)
Only two: (4, 9) and (6, 6). In all other factor pairs, one of the numbers is not composite.
1 and 500, 2 and 250, 4 and 125, 5 and 100, 10 and 50, 20 and 25, a total of 6 factor pairs.
1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.
4
Factor pairs of 16 are 1 and 16, 2 and 8, and 4 and 4.