1808980225

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{428161}}^1$

素因数の和:428197

約数の個数: 18

約数和(自身を含む): 2428963026

約数和(自身を除く): 619982801

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 428161, 2140805, 5566093, 10704025, 27830465, 72359209, 139152325, 361796045, 1808980225]

約数ペア:

[(1, 1808980225), (5, 361796045), (13, 139152325), (25, 72359209), (65, 27830465), (169, 10704025), (325, 5566093), (845, 2140805), (4225, 428161)]