21080852

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{405401}}^1$

素因数の和:405418

約数の個数: 12

約数和(自身を含む): 39729396

約数和(自身を除く): 18648544

約数列:

[1, 2, 4, 13, 26, 52, 405401, 810802, 1621604, 5270213, 10540426, 21080852]

約数ペア:

[(1, 21080852), (2, 10540426), (4, 5270213), (13, 1621604), (26, 810802), (52, 405401)]