20939815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{1163}}^1$

素因数の和:1458

約数の個数: 16

約数和(自身を含む): 27181728

約数和(自身を除く): 6241913

約数列:

[1, 5, 13, 65, 277, 1163, 1385, 3601, 5815, 15119, 18005, 75595, 322151, 1610755, 4187963, 20939815]

約数ペア:

[(1, 20939815), (5, 4187963), (13, 1610755), (65, 322151), (277, 75595), (1163, 18005), (1385, 15119), (3601, 5815)]