21393268

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{411409}}^1$

素因数の和:411426

約数の個数: 12

約数和(自身を含む): 40318180

約数和(自身を除く): 18924912

約数列:

[1, 2, 4, 13, 26, 52, 411409, 822818, 1645636, 5348317, 10696634, 21393268]

約数ペア:

[(1, 21393268), (2, 10696634), (4, 5348317), (13, 1645636), (26, 822818), (52, 411409)]