21005251

素因数分解:

${\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{311}}^1$

素因数の和:494

約数の個数: 16

約数和(自身を含む): 23250240

約数和(自身を除く): 2244989

約数列:

[1, 17, 29, 137, 311, 493, 2329, 3973, 5287, 9019, 42607, 67541, 153323, 724319, 1235603, 21005251]

約数ペア:

[(1, 21005251), (17, 1235603), (29, 724319), (137, 153323), (311, 67541), (493, 42607), (2329, 9019), (3973, 5287)]