21081291

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{263}}^1\times {\mathrm{347}}^1$

素因数の和:631

約数の個数: 32

約数和(自身を含む): 35278848

約数和(自身を除く): 14197557

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 263, 347, 789, 1041, 1841, 2429, 2893, 3817, 5523, 7287, 8679, 11451, 20251, 26719, 60753, 80157, 91261, 273783, 638827, 1003871, 1916481, 3011613, 7027097, 21081291]

約数ペア:

[(1, 21081291), (3, 7027097), (7, 3011613), (11, 1916481), (21, 1003871), (33, 638827), (77, 273783), (231, 91261), (263, 80157), (347, 60753), (789, 26719), (1041, 20251), (1841, 11451), (2429, 8679), (2893, 7287), (3817, 5523)]