20913640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:211

約数の個数: 96

約数和(自身を含む): 53865000

約数和(自身を除く): 32951360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 121, 145, 149, 220, 232, 242, 290, 298, 319, 440, 484, 580, 596, 605, 638, 745, 968, 1160, 1192, 1210, 1276, 1490, 1595, 1639, 2420, 2552, 2980, 3190, 3278, 3509, 4321, 4840, 5960, 6380, 6556, 7018, 8195, 8642, 12760, 13112, 14036, 16390, 17284, 17545, 18029, 21605, 28072, 32780, 34568, 35090, 36058, 43210, 47531, 65560, 70180, 72116, 86420, 90145, 95062, 140360, 144232, 172840, 180290, 190124, 237655, 360580, 380248, 475310, 522841, 721160, 950620, 1045682, 1901240, 2091364, 2614205, 4182728, 5228410, 10456820, 20913640]

約数ペア:

[(1, 20913640), (2, 10456820), (4, 5228410), (5, 4182728), (8, 2614205), (10, 2091364), (11, 1901240), (20, 1045682), (22, 950620), (29, 721160), (40, 522841), (44, 475310), (55, 380248), (58, 360580), (88, 237655), (110, 190124), (116, 180290), (121, 172840), (145, 144232), (149, 140360), (220, 95062), (232, 90145), (242, 86420), (290, 72116), (298, 70180), (319, 65560), (440, 47531), (484, 43210), (580, 36058), (596, 35090), (605, 34568), (638, 32780), (745, 28072), (968, 21605), (1160, 18029), (1192, 17545), (1210, 17284), (1276, 16390), (1490, 14036), (1595, 13112), (1639, 12760), (2420, 8642), (2552, 8195), (2980, 7018), (3190, 6556), (3278, 6380), (3509, 5960), (4321, 4840)]