90901640

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{20849}}^1$

素因数の和:20969

約数の個数: 32

約数和(自身を含む): 206415000

約数和(自身を除く): 115513360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 20849, 41698, 83396, 104245, 166792, 208490, 416980, 833960, 2272541, 4545082, 9090164, 11362705, 18180328, 22725410, 45450820, 90901640]

約数ペア:

[(1, 90901640), (2, 45450820), (4, 22725410), (5, 18180328), (8, 11362705), (10, 9090164), (20, 4545082), (40, 2272541), (109, 833960), (218, 416980), (436, 208490), (545, 166792), (872, 104245), (1090, 83396), (2180, 41698), (4360, 20849)]