1) 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
2) 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
3) 1, 5, 25, 125
4) 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
