19881333

素因数分解:

$3^2\times {\mathrm{113}}^2\times {\mathrm{173}}^1$

素因数の和:405

約数の個数: 18

約数和(自身を含む): 29141346

約数和(自身を除く): 9260013

約数列:

[1, 3, 9, 113, 173, 339, 519, 1017, 1557, 12769, 19549, 38307, 58647, 114921, 175941, 2209037, 6627111, 19881333]

約数ペア:

[(1, 19881333), (3, 6627111), (9, 2209037), (113, 175941), (173, 114921), (339, 58647), (519, 38307), (1017, 19549), (1557, 12769)]