20891331

素因数分解:

$3^3\times {\mathrm{397}}^1\times {\mathrm{1949}}^1$

素因数の和:2355

約数の個数: 16

約数和(自身を含む): 31044000

約数和(自身を除く): 10152669

約数列:

[1, 3, 9, 27, 397, 1191, 1949, 3573, 5847, 10719, 17541, 52623, 773753, 2321259, 6963777, 20891331]

約数ペア:

[(1, 20891331), (3, 6963777), (9, 2321259), (27, 773753), (397, 52623), (1191, 17541), (1949, 10719), (3573, 5847)]