20688811

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 25297920

約数和(自身を除く): 4609109

約数列:

[1, 11, 13, 31, 143, 169, 341, 359, 403, 1859, 3949, 4433, 4667, 5239, 11129, 51337, 57629, 60671, 122419, 144677, 667381, 1591447, 1880801, 20688811]

約数ペア:

[(1, 20688811), (11, 1880801), (13, 1591447), (31, 667381), (143, 144677), (169, 122419), (341, 60671), (359, 57629), (403, 51337), (1859, 11129), (3949, 5239), (4433, 4667)]