20770376

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{499}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 43890000

約数和(自身を除く): 23119624

約数列:

[1, 2, 4, 8, 11, 22, 43, 44, 86, 88, 121, 172, 242, 344, 473, 484, 499, 946, 968, 998, 1892, 1996, 3784, 3992, 5203, 5489, 10406, 10978, 20812, 21457, 21956, 41624, 42914, 43912, 60379, 85828, 120758, 171656, 236027, 241516, 472054, 483032, 944108, 1888216, 2596297, 5192594, 10385188, 20770376]

約数ペア:

[(1, 20770376), (2, 10385188), (4, 5192594), (8, 2596297), (11, 1888216), (22, 944108), (43, 483032), (44, 472054), (86, 241516), (88, 236027), (121, 171656), (172, 120758), (242, 85828), (344, 60379), (473, 43912), (484, 42914), (499, 41624), (946, 21956), (968, 21457), (998, 20812), (1892, 10978), (1996, 10406), (3784, 5489), (3992, 5203)]