Запишите все делители числа:
18, 8, 13, 56.
30, 12, 23, 72

18: 1, 2, 3, 6, 9, 18
8: 1, 2, 4, 8
13: 1, 13
56: 1, 2, 4, 7, 8, 14, 28, 56

30: 1, 2, 3, 5, 6, 10, 15, 30
12: 1, 2, 3, 4, 6, 12
23: 1, 23
72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72