21905481

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{6311}}^1$

素因数の和:6416

約数の個数: 16

約数和(自身を含む): 31812480

約数和(自身を除く): 9906999

約数列:

[1, 3, 13, 39, 89, 267, 1157, 3471, 6311, 18933, 82043, 246129, 561679, 1685037, 7301827, 21905481]

約数ペア:

[(1, 21905481), (3, 7301827), (13, 1685037), (39, 561679), (89, 246129), (267, 82043), (1157, 18933), (3471, 6311)]