81648220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{99571}}^1$

素因数の和:99621

約数の個数: 24

約数和(自身を含む): 175645008

約数和(自身を除く): 93996788

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 99571, 199142, 398284, 497855, 995710, 1991420, 4082411, 8164822, 16329644, 20412055, 40824110, 81648220]

約数ペア:

[(1, 81648220), (2, 40824110), (4, 20412055), (5, 16329644), (10, 8164822), (20, 4082411), (41, 1991420), (82, 995710), (164, 497855), (205, 398284), (410, 199142), (820, 99571)]