90404180

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^2\times {\mathrm{2689}}^1$

素因数の和:2780

約数の個数: 36

約数和(自身を含む): 194664540

約数和(自身を除く): 104260360

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 1681, 2689, 3362, 5378, 6724, 8405, 10756, 13445, 16810, 26890, 33620, 53780, 110249, 220498, 440996, 551245, 1102490, 2204980, 4520209, 9040418, 18080836, 22601045, 45202090, 90404180]

約数ペア:

[(1, 90404180), (2, 45202090), (4, 22601045), (5, 18080836), (10, 9040418), (20, 4520209), (41, 2204980), (82, 1102490), (164, 551245), (205, 440996), (410, 220498), (820, 110249), (1681, 53780), (2689, 33620), (3362, 26890), (5378, 16810), (6724, 13445), (8405, 10756)]