20993271

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{691}}^1$

素因数の和:767

約数の個数: 32

約数和(自身を含む): 32551680

約数和(自身を除く): 11558409

約数列:

[1, 3, 13, 19, 39, 41, 57, 123, 247, 533, 691, 741, 779, 1599, 2073, 2337, 8983, 10127, 13129, 26949, 28331, 30381, 39387, 84993, 170677, 368303, 512031, 538289, 1104909, 1614867, 6997757, 20993271]

約数ペア:

[(1, 20993271), (3, 6997757), (13, 1614867), (19, 1104909), (39, 538289), (41, 512031), (57, 368303), (123, 170677), (247, 84993), (533, 39387), (691, 30381), (741, 28331), (779, 26949), (1599, 13129), (2073, 10127), (2337, 8983)]