18138475

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{359}}^1$

素因数の和:459

約数の個数: 24

約数和(自身を含む): 23569920

約数和(自身を除く): 5431445

約数列:

[1, 5, 25, 43, 47, 215, 235, 359, 1075, 1175, 1795, 2021, 8975, 10105, 15437, 16873, 50525, 77185, 84365, 385925, 421825, 725539, 3627695, 18138475]

約数ペア:

[(1, 18138475), (5, 3627695), (25, 725539), (43, 421825), (47, 385925), (215, 84365), (235, 77185), (359, 50525), (1075, 16873), (1175, 15437), (1795, 10105), (2021, 8975)]