8163640

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{499}}^1$

素因数の和:919

約数の個数: 32

約数和(自身を含む): 18450000

約数和(自身を除く): 10286360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 499, 818, 998, 1636, 1996, 2045, 2495, 3272, 3992, 4090, 4990, 8180, 9980, 16360, 19960, 204091, 408182, 816364, 1020455, 1632728, 2040910, 4081820, 8163640]

約数ペア:

[(1, 8163640), (2, 4081820), (4, 2040910), (5, 1632728), (8, 1020455), (10, 816364), (20, 408182), (40, 204091), (409, 19960), (499, 16360), (818, 9980), (998, 8180), (1636, 4990), (1996, 4090), (2045, 3992), (2495, 3272)]