21491587

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{3137}}^1$

素因数の和:3198

約数の個数: 16

約数和(自身を含む): 25304832

約数和(自身を除く): 3813245

約数列:

[1, 13, 17, 31, 221, 403, 527, 3137, 6851, 40781, 53329, 97247, 693277, 1264211, 1653199, 21491587]

約数ペア:

[(1, 21491587), (13, 1653199), (17, 1264211), (31, 693277), (221, 97247), (403, 53329), (527, 40781), (3137, 6851)]