21551231

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{1009}}^1$

素因数の和:1106

約数の個数: 16

約数和(自身を含む): 24433920

約数和(自身を除く): 2882689

約数列:

[1, 13, 31, 53, 403, 689, 1009, 1643, 13117, 21359, 31279, 53477, 406627, 695201, 1657787, 21551231]

約数ペア:

[(1, 21551231), (13, 1657787), (31, 695201), (53, 406627), (403, 53477), (689, 31279), (1009, 21359), (1643, 13117)]