21742220

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2711}}^1$

素因数の和:3121

約数の個数: 24

約数和(自身を含む): 45789408

約数和(自身を除く): 24047188

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2711, 4010, 5422, 8020, 10844, 13555, 27110, 54220, 1087111, 2174222, 4348444, 5435555, 10871110, 21742220]

約数ペア:

[(1, 21742220), (2, 10871110), (4, 5435555), (5, 4348444), (10, 2174222), (20, 1087111), (401, 54220), (802, 27110), (1604, 13555), (2005, 10844), (2711, 8020), (4010, 5422)]