408040

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^2$

素因数の和:213

約数の個数: 24

約数和(自身を含む): 927270

約数和(自身を除く): 519230

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 10201, 20402, 40804, 51005, 81608, 102010, 204020, 408040]

約数ペア:

[(1, 408040), (2, 204020), (4, 102010), (5, 81608), (8, 51005), (10, 40804), (20, 20402), (40, 10201), (101, 4040), (202, 2020), (404, 1010), (505, 808)]