81531760

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{311}}^1$

素因数の和:466

約数の個数: 80

約数和(自身を含む): 198469440

約数和(自身を除く): 116937680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 113, 116, 145, 226, 232, 290, 311, 452, 464, 565, 580, 622, 904, 1130, 1160, 1244, 1555, 1808, 2260, 2320, 2488, 3110, 3277, 4520, 4976, 6220, 6554, 9019, 9040, 12440, 13108, 16385, 18038, 24880, 26216, 32770, 35143, 36076, 45095, 52432, 65540, 70286, 72152, 90190, 131080, 140572, 144304, 175715, 180380, 262160, 281144, 351430, 360760, 562288, 702860, 721520, 1019147, 1405720, 2038294, 2811440, 4076588, 5095735, 8153176, 10191470, 16306352, 20382940, 40765880, 81531760]

約数ペア:

[(1, 81531760), (2, 40765880), (4, 20382940), (5, 16306352), (8, 10191470), (10, 8153176), (16, 5095735), (20, 4076588), (29, 2811440), (40, 2038294), (58, 1405720), (80, 1019147), (113, 721520), (116, 702860), (145, 562288), (226, 360760), (232, 351430), (290, 281144), (311, 262160), (452, 180380), (464, 175715), (565, 144304), (580, 140572), (622, 131080), (904, 90190), (1130, 72152), (1160, 70286), (1244, 65540), (1555, 52432), (1808, 45095), (2260, 36076), (2320, 35143), (2488, 32770), (3110, 26216), (3277, 24880), (4520, 18038), (4976, 16385), (6220, 13108), (6554, 12440), (9019, 9040)]