20988528028

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{403625539}}^1$

素因数の和:403625556

約数の個数: 12

約数和(自身を含む): 39555302920

約数和(自身を除く): 18566774892

約数列:

[1, 2, 4, 13, 26, 52, 403625539, 807251078, 1614502156, 5247132007, 10494264014, 20988528028]

約数ペア:

[(1, 20988528028), (2, 10494264014), (4, 5247132007), (13, 1614502156), (26, 807251078), (52, 403625539)]