15: 1, 3, 5, 15

88: 1, 2, 4, 8, 11, 22, 44, 88

36: 1, 2, 3, 4, 6, 9, 12, 18, 36

144: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144

500: 1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500