21306861

素因数分解:

$3^3\times {\mathrm{617}}^1\times {\mathrm{1279}}^1$

素因数の和:1905

約数の個数: 16

約数和(自身を含む): 31641600

約数和(自身を除く): 10334739

約数列:

[1, 3, 9, 27, 617, 1279, 1851, 3837, 5553, 11511, 16659, 34533, 789143, 2367429, 7102287, 21306861]

約数ペア:

[(1, 21306861), (3, 7102287), (9, 2367429), (27, 789143), (617, 34533), (1279, 16659), (1851, 11511), (3837, 5553)]