1638220

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{811}}^1$

素因数の和:921

約数の個数: 24

約数和(自身を含む): 3478608

約数和(自身を除く): 1840388

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 404, 505, 811, 1010, 1622, 2020, 3244, 4055, 8110, 16220, 81911, 163822, 327644, 409555, 819110, 1638220]

約数ペア:

[(1, 1638220), (2, 819110), (4, 409555), (5, 327644), (10, 163822), (20, 81911), (101, 16220), (202, 8110), (404, 4055), (505, 3244), (811, 2020), (1010, 1622)]