81189800

素因数分解:

$2^3\times 5^2\times {\mathrm{405949}}^1$

素因数の和:405965

約数の個数: 24

約数和(自身を含む): 188766750

約数和(自身を除く): 107576950

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 405949, 811898, 1623796, 2029745, 3247592, 4059490, 8118980, 10148725, 16237960, 20297450, 40594900, 81189800]

約数ペア:

[(1, 81189800), (2, 40594900), (4, 20297450), (5, 16237960), (8, 10148725), (10, 8118980), (20, 4059490), (25, 3247592), (40, 2029745), (50, 1623796), (100, 811898), (200, 405949)]