21081032908

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{405404479}}^1$

素因数の和:405404496

約数の個数: 12

約数和(自身を含む): 39729639040

約数和(自身を除く): 18648606132

約数列:

[1, 2, 4, 13, 26, 52, 405404479, 810808958, 1621617916, 5270258227, 10540516454, 21081032908]

約数ペア:

[(1, 21081032908), (2, 10540516454), (4, 5270258227), (13, 1621617916), (26, 810808958), (52, 405404479)]