19995903

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{5741}}^1$

素因数の和:5796

約数の個数: 20

約数和(自身を含む): 30570408

約数和(自身を除く): 10574505

約数列:

[1, 3, 9, 27, 43, 81, 129, 387, 1161, 3483, 5741, 17223, 51669, 155007, 246863, 465021, 740589, 2221767, 6665301, 19995903]

約数ペア:

[(1, 19995903), (3, 6665301), (9, 2221767), (27, 740589), (43, 465021), (81, 246863), (129, 155007), (387, 51669), (1161, 17223), (3483, 5741)]