20521180

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{10159}}^1$

素因数の和:10269

約数の個数: 24

約数和(自身を含む): 43525440

約数和(自身を除く): 23004260

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 1010, 2020, 10159, 20318, 40636, 50795, 101590, 203180, 1026059, 2052118, 4104236, 5130295, 10260590, 20521180]

約数ペア:

[(1, 20521180), (2, 10260590), (4, 5130295), (5, 4104236), (10, 2052118), (20, 1026059), (101, 203180), (202, 101590), (404, 50795), (505, 40636), (1010, 20318), (2020, 10159)]