19805553

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{10631}}^1$

素因数の和:10666

約数の個数: 20

約数和(自身を含む): 30875328

約数和(自身を除く): 11069775

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 10631, 31893, 95679, 244513, 287037, 733539, 861111, 2200617, 6601851, 19805553]

約数ペア:

[(1, 19805553), (3, 6601851), (9, 2200617), (23, 861111), (27, 733539), (69, 287037), (81, 244513), (207, 95679), (621, 31893), (1863, 10631)]