21057625

素因数分解:

$5^3\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:238

約数の個数: 32

約数和(自身を含む): 28098720

約数和(自身を除く): 7041095

約数列:

[1, 5, 25, 29, 37, 125, 145, 157, 185, 725, 785, 925, 1073, 3625, 3925, 4553, 4625, 5365, 5809, 19625, 22765, 26825, 29045, 113825, 134125, 145225, 168461, 569125, 726125, 842305, 4211525, 21057625]

約数ペア:

[(1, 21057625), (5, 4211525), (25, 842305), (29, 726125), (37, 569125), (125, 168461), (145, 145225), (157, 134125), (185, 113825), (725, 29045), (785, 26825), (925, 22765), (1073, 19625), (3625, 5809), (3925, 5365), (4553, 4625)]