21081085

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{277}}^1\times {\mathrm{491}}^1$

素因数の和:804

約数の個数: 16

約数和(自身を含む): 26260992

約数和(自身を除く): 5179907

約数列:

[1, 5, 31, 155, 277, 491, 1385, 2455, 8587, 15221, 42935, 76105, 136007, 680035, 4216217, 21081085]

約数ペア:

[(1, 21081085), (5, 4216217), (31, 680035), (155, 136007), (277, 76105), (491, 42935), (1385, 15221), (2455, 8587)]