20855109

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{521}}^1\times {\mathrm{1213}}^1$

素因数の和:1748

約数の個数: 16

約数和(自身を含む): 30417984

約数和(自身を除く): 9562875

約数列:

[1, 3, 11, 33, 521, 1213, 1563, 3639, 5731, 13343, 17193, 40029, 631973, 1895919, 6951703, 20855109]

約数ペア:

[(1, 20855109), (3, 6951703), (11, 1895919), (33, 631973), (521, 40029), (1213, 17193), (1563, 13343), (3639, 5731)]