21213491

素因数分解:

${\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{277}}^1$

素因数の和:470

約数の個数: 16

約数和(自身を含む): 23632224

約数和(自身を除く): 2418733

約数列:

[1, 13, 43, 137, 277, 559, 1781, 3601, 5891, 11911, 37949, 76583, 154843, 493337, 1631807, 21213491]

約数ペア:

[(1, 21213491), (13, 1631807), (43, 493337), (137, 154843), (277, 76583), (559, 37949), (1781, 11911), (3601, 5891)]