30 - 1, 2, 3, 5, 6, 10, 15, 30
42 - 1, 2, 3, 6, 7, 14, 21, 42
НОД = 6.
36 - 1, 2, 3, 4, 6, 9, 12, 18, 36
63 - 1, 3, 7, 9, 21, 63
НОД = 9
27 - 1, 3, 9
54 - 1, 3, 6, 9, 18, 27, 54
НОД = 27
80 = 1, 2, 4, 5, 8, 10, 16, 20, 40...
32 = 1, 2, 4, 8, 16, 32
НОД = 16