The factors of 72 are __________________.
5, 7, 10, 11, 13, 17, 21 and 23
1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72
5, 7, 13, 14, 15, 16, 17 and 19
5, 7, 11, 13, 15, 16, 17, 20, and 25
72=1×72
=2×36
=3×24
=4×18
=6×12
=8×9
Factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72.
The factors of a2+b−ab−a are :