21809879

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{3929}}^1$

素因数の和:4010

約数の個数: 16

約数和(自身を含む): 27289920

約数和(自身を除く): 5480041

約数列:

[1, 7, 13, 61, 91, 427, 793, 3929, 5551, 27503, 51077, 239669, 357539, 1677683, 3115697, 21809879]

約数ペア:

[(1, 21809879), (7, 3115697), (13, 1677683), (61, 357539), (91, 239669), (427, 51077), (793, 27503), (3929, 5551)]