21393411

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28871}}^1$

素因数の和:28906

約数の個数: 16

約数和(自身を含む): 32336640

約数和(自身を除く): 10943229

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28871, 86613, 375323, 548549, 1125969, 1645647, 7131137, 21393411]

約数ペア:

[(1, 21393411), (3, 7131137), (13, 1645647), (19, 1125969), (39, 548549), (57, 375323), (247, 86613), (741, 28871)]