20464560

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:723

約数の個数: 120

約数和(自身を含む): 70431504

約数和(自身を除く): 49966944

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, 661, 688, 720, 774, 860, 1032, 1290, 1322, 1548, 1720, 1935, 1983, 2064, 2580, 2644, 3096, 3305, 3440, 3870, 3966, 5160, 5288, 5949, 6192, 6610, 7740, 7932, 9915, 10320, 10576, 11898, 13220, 15480, 15864, 19830, 23796, 26440, 28423, 29745, 30960, 31728, 39660, 47592, 52880, 56846, 59490, 79320, 85269, 95184, 113692, 118980, 142115, 158640, 170538, 227384, 237960, 255807, 284230, 341076, 426345, 454768, 475920, 511614, 568460, 682152, 852690, 1023228, 1136920, 1279035, 1364304, 1705380, 2046456, 2273840, 2558070, 3410760, 4092912, 5116140, 6821520, 10232280, 20464560]

約数ペア:

[(1, 20464560), (2, 10232280), (3, 6821520), (4, 5116140), (5, 4092912), (6, 3410760), (8, 2558070), (9, 2273840), (10, 2046456), (12, 1705380), (15, 1364304), (16, 1279035), (18, 1136920), (20, 1023228), (24, 852690), (30, 682152), (36, 568460), (40, 511614), (43, 475920), (45, 454768), (48, 426345), (60, 341076), (72, 284230), (80, 255807), (86, 237960), (90, 227384), (120, 170538), (129, 158640), (144, 142115), (172, 118980), (180, 113692), (215, 95184), (240, 85269), (258, 79320), (344, 59490), (360, 56846), (387, 52880), (430, 47592), (516, 39660), (645, 31728), (661, 30960), (688, 29745), (720, 28423), (774, 26440), (860, 23796), (1032, 19830), (1290, 15864), (1322, 15480), (1548, 13220), (1720, 11898), (1935, 10576), (1983, 10320), (2064, 9915), (2580, 7932), (2644, 7740), (3096, 6610), (3305, 6192), (3440, 5949), (3870, 5288), (3966, 5160)]