2156391

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:227

約数の個数: 24

約数和(自身を含む): 3294720

約数和(自身を除く): 1138329

約数列:

[1, 3, 9, 31, 59, 93, 131, 177, 279, 393, 531, 1179, 1829, 4061, 5487, 7729, 12183, 16461, 23187, 36549, 69561, 239599, 718797, 2156391]

約数ペア:

[(1, 2156391), (3, 718797), (9, 239599), (31, 69561), (59, 36549), (93, 23187), (131, 16461), (177, 12183), (279, 7729), (393, 5487), (531, 4061), (1179, 1829)]