21811413

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{7877}}^1$

素因数の和:7964

約数の個数: 16

約数和(自身を含む): 31764096

約数和(自身を除く): 9952683

約数列:

[1, 3, 13, 39, 71, 213, 923, 2769, 7877, 23631, 102401, 307203, 559267, 1677801, 7270471, 21811413]

約数ペア:

[(1, 21811413), (3, 7270471), (13, 1677801), (39, 559267), (71, 307203), (213, 102401), (923, 23631), (2769, 7877)]