20931755

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7489}}^1$

素因数の和:7550

約数の個数: 16

約数和(自身を含む): 27683040

約数和(自身を除く): 6751285

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7489, 37445, 97357, 322027, 486785, 1610135, 4186351, 20931755]

約数ペア:

[(1, 20931755), (5, 4186351), (13, 1610135), (43, 486785), (65, 322027), (215, 97357), (559, 37445), (2795, 7489)]