21905081

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{643}}^1$

素因数の和:836

約数の個数: 16

約数和(自身を含む): 25347840

約数和(自身を除く): 3442759

約数列:

[1, 11, 19, 163, 209, 643, 1793, 3097, 7073, 12217, 34067, 104809, 134387, 1152899, 1991371, 21905081]

約数ペア:

[(1, 21905081), (11, 1991371), (19, 1152899), (163, 134387), (209, 104809), (643, 34067), (1793, 12217), (3097, 7073)]