20999121

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1579}}^1$

素因数の和:1637

約数の個数: 32

約数和(自身を含む): 33976320

約数和(自身を除く): 12977199

約数列:

[1, 3, 11, 13, 31, 33, 39, 93, 143, 341, 403, 429, 1023, 1209, 1579, 4433, 4737, 13299, 17369, 20527, 48949, 52107, 61581, 146847, 225797, 538439, 636337, 677391, 1615317, 1909011, 6999707, 20999121]

約数ペア:

[(1, 20999121), (3, 6999707), (11, 1909011), (13, 1615317), (31, 677391), (33, 636337), (39, 538439), (93, 225797), (143, 146847), (341, 61581), (403, 52107), (429, 48949), (1023, 20527), (1209, 17369), (1579, 13299), (4433, 4737)]