21497360

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{14143}}^1$

素因数の和:14175

約数の個数: 40

約数和(自身を含む): 52615680

約数和(自身を除く): 31118320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 14143, 28286, 56572, 70715, 113144, 141430, 226288, 268717, 282860, 537434, 565720, 1074868, 1131440, 1343585, 2149736, 2687170, 4299472, 5374340, 10748680, 21497360]

約数ペア:

[(1, 21497360), (2, 10748680), (4, 5374340), (5, 4299472), (8, 2687170), (10, 2149736), (16, 1343585), (19, 1131440), (20, 1074868), (38, 565720), (40, 537434), (76, 282860), (80, 268717), (95, 226288), (152, 141430), (190, 113144), (304, 70715), (380, 56572), (760, 28286), (1520, 14143)]