21108687

素因数分解:

$3^1\times {\mathrm{23}}^2\times {\mathrm{47}}^1\times {\mathrm{283}}^1$

素因数の和:379

約数の個数: 24

約数和(自身を含む): 30153984

約数和(自身を除く): 9045297

約数列:

[1, 3, 23, 47, 69, 141, 283, 529, 849, 1081, 1587, 3243, 6509, 13301, 19527, 24863, 39903, 74589, 149707, 305923, 449121, 917769, 7036229, 21108687]

約数ペア:

[(1, 21108687), (3, 7036229), (23, 917769), (47, 449121), (69, 305923), (141, 149707), (283, 74589), (529, 39903), (849, 24863), (1081, 19527), (1587, 13301), (3243, 6509)]