21779181

素因数分解:

$3^2\times {\mathrm{109}}^1\times {\mathrm{149}}^2$

素因数の和:413

約数の個数: 18

約数和(自身を含む): 31961930

約数和(自身を除く): 10182749

約数列:

[1, 3, 9, 109, 149, 327, 447, 981, 1341, 16241, 22201, 48723, 66603, 146169, 199809, 2419909, 7259727, 21779181]

約数ペア:

[(1, 21779181), (3, 7259727), (9, 2419909), (109, 199809), (149, 146169), (327, 66603), (447, 48723), (981, 22201), (1341, 16241)]