18821725

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1997}}^1$

素因数の和:2049

約数の個数: 24

約数和(自身を含む): 26013960

約数和(自身を除く): 7192235

約数列:

[1, 5, 13, 25, 29, 65, 145, 325, 377, 725, 1885, 1997, 9425, 9985, 25961, 49925, 57913, 129805, 289565, 649025, 752869, 1447825, 3764345, 18821725]

約数ペア:

[(1, 18821725), (5, 3764345), (13, 1447825), (25, 752869), (29, 649025), (65, 289565), (145, 129805), (325, 57913), (377, 49925), (725, 25961), (1885, 9985), (1997, 9425)]