81391311

素因数分解:

$3^4\times {\mathrm{139}}^1\times {\mathrm{7229}}^1$

素因数の和:7380

約数の個数: 20

約数和(自身を含む): 122476200

約数和(自身を除く): 41084889

約数列:

[1, 3, 9, 27, 81, 139, 417, 1251, 3753, 7229, 11259, 21687, 65061, 195183, 585549, 1004831, 3014493, 9043479, 27130437, 81391311]

約数ペア:

[(1, 81391311), (3, 27130437), (9, 9043479), (27, 3014493), (81, 1004831), (139, 585549), (417, 195183), (1251, 65061), (3753, 21687), (7229, 11259)]