21215409

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{137}}^1\times {\mathrm{1259}}^1$

素因数の和:1440

約数の個数: 16

約数和(自身を含む): 29211840

約数和(自身を除く): 7996431

約数列:

[1, 3, 41, 123, 137, 411, 1259, 3777, 5617, 16851, 51619, 154857, 172483, 517449, 7071803, 21215409]

約数ペア:

[(1, 21215409), (3, 7071803), (41, 517449), (123, 172483), (137, 154857), (411, 51619), (1259, 16851), (3777, 5617)]