20985140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:249

約数の個数: 96

約数和(自身を含む): 52835328

約数和(自身を除く): 31850188

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 31, 34, 44, 55, 62, 68, 85, 110, 124, 155, 170, 181, 187, 220, 310, 340, 341, 362, 374, 527, 620, 682, 724, 748, 905, 935, 1054, 1364, 1705, 1810, 1870, 1991, 2108, 2635, 3077, 3410, 3620, 3740, 3982, 5270, 5611, 5797, 6154, 6820, 7964, 9955, 10540, 11222, 11594, 12308, 15385, 19910, 22444, 23188, 28055, 28985, 30770, 33847, 39820, 56110, 57970, 61540, 61721, 67694, 95387, 112220, 115940, 123442, 135388, 169235, 190774, 246884, 308605, 338470, 381548, 476935, 617210, 676940, 953870, 1049257, 1234420, 1907740, 2098514, 4197028, 5246285, 10492570, 20985140]

約数ペア:

[(1, 20985140), (2, 10492570), (4, 5246285), (5, 4197028), (10, 2098514), (11, 1907740), (17, 1234420), (20, 1049257), (22, 953870), (31, 676940), (34, 617210), (44, 476935), (55, 381548), (62, 338470), (68, 308605), (85, 246884), (110, 190774), (124, 169235), (155, 135388), (170, 123442), (181, 115940), (187, 112220), (220, 95387), (310, 67694), (340, 61721), (341, 61540), (362, 57970), (374, 56110), (527, 39820), (620, 33847), (682, 30770), (724, 28985), (748, 28055), (905, 23188), (935, 22444), (1054, 19910), (1364, 15385), (1705, 12308), (1810, 11594), (1870, 11222), (1991, 10540), (2108, 9955), (2635, 7964), (3077, 6820), (3410, 6154), (3620, 5797), (3740, 5611), (3982, 5270)]