17981973

素因数分解:

$3^3\times {\mathrm{641}}^1\times {\mathrm{1039}}^1$

素因数の和:1689

約数の個数: 16

約数和(自身を含む): 26707200

約数和(自身を除く): 8725227

約数列:

[1, 3, 9, 27, 641, 1039, 1923, 3117, 5769, 9351, 17307, 28053, 665999, 1997997, 5993991, 17981973]

約数ペア:

[(1, 17981973), (3, 5993991), (9, 1997997), (27, 665999), (641, 28053), (1039, 17307), (1923, 9351), (3117, 5769)]