81751420

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{40471}}^1$

素因数の和:40581

約数の個数: 24

約数和(自身を含む): 173382048

約数和(自身を除く): 91630628

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 40471, 80942, 161884, 202355, 404710, 809420, 4087571, 8175142, 16350284, 20437855, 40875710, 81751420]

約数ペア:

[(1, 81751420), (2, 40875710), (4, 20437855), (5, 16350284), (10, 8175142), (20, 4087571), (101, 809420), (202, 404710), (404, 202355), (505, 161884), (1010, 80942), (2020, 40471)]