21394659

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{49871}}^1$

素因数の和:49898

約数の個数: 16

約数和(自身を含む): 33513984

約数和(自身を除く): 12119325

約数列:

[1, 3, 11, 13, 33, 39, 143, 429, 49871, 149613, 548581, 648323, 1645743, 1944969, 7131553, 21394659]

約数ペア:

[(1, 21394659), (3, 7131553), (11, 1944969), (13, 1645743), (33, 648323), (39, 548581), (143, 149613), (429, 49871)]