20904819

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{17291}}^1$

素因数の和:17338

約数の個数: 16

約数和(自身を含む): 30987264

約数和(自身を除く): 10082445

約数列:

[1, 3, 13, 31, 39, 93, 403, 1209, 17291, 51873, 224783, 536021, 674349, 1608063, 6968273, 20904819]

約数ペア:

[(1, 20904819), (3, 6968273), (13, 1608063), (31, 674349), (39, 536021), (93, 224783), (403, 51873), (1209, 17291)]