20959920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{677}}^1$

素因数の和:739

約数の個数: 120

約数和(自身を含む): 72133776

約数和(自身を除く): 51173856

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 43, 45, 48, 60, 72, 80, 86, 90, 120, 129, 144, 172, 180, 215, 240, 258, 344, 360, 387, 430, 516, 645, 677, 688, 720, 774, 860, 1032, 1290, 1354, 1548, 1720, 1935, 2031, 2064, 2580, 2708, 3096, 3385, 3440, 3870, 4062, 5160, 5416, 6093, 6192, 6770, 7740, 8124, 10155, 10320, 10832, 12186, 13540, 15480, 16248, 20310, 24372, 27080, 29111, 30465, 30960, 32496, 40620, 48744, 54160, 58222, 60930, 81240, 87333, 97488, 116444, 121860, 145555, 162480, 174666, 232888, 243720, 261999, 291110, 349332, 436665, 465776, 487440, 523998, 582220, 698664, 873330, 1047996, 1164440, 1309995, 1397328, 1746660, 2095992, 2328880, 2619990, 3493320, 4191984, 5239980, 6986640, 10479960, 20959920]

約数ペア:

[(1, 20959920), (2, 10479960), (3, 6986640), (4, 5239980), (5, 4191984), (6, 3493320), (8, 2619990), (9, 2328880), (10, 2095992), (12, 1746660), (15, 1397328), (16, 1309995), (18, 1164440), (20, 1047996), (24, 873330), (30, 698664), (36, 582220), (40, 523998), (43, 487440), (45, 465776), (48, 436665), (60, 349332), (72, 291110), (80, 261999), (86, 243720), (90, 232888), (120, 174666), (129, 162480), (144, 145555), (172, 121860), (180, 116444), (215, 97488), (240, 87333), (258, 81240), (344, 60930), (360, 58222), (387, 54160), (430, 48744), (516, 40620), (645, 32496), (677, 30960), (688, 30465), (720, 29111), (774, 27080), (860, 24372), (1032, 20310), (1290, 16248), (1354, 15480), (1548, 13540), (1720, 12186), (1935, 10832), (2031, 10320), (2064, 10155), (2580, 8124), (2708, 7740), (3096, 6770), (3385, 6192), (3440, 6093), (3870, 5416), (4062, 5160)]