20897037

素因数分解:

$3^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{811}}^1$

素因数の和:1233

約数の個数: 24

約数和(自身を含む): 34623680

約数和(自身を除く): 13726643

約数列:

[1, 3, 7, 9, 21, 63, 409, 811, 1227, 2433, 2863, 3681, 5677, 7299, 8589, 17031, 25767, 51093, 331699, 995097, 2321893, 2985291, 6965679, 20897037]

約数ペア:

[(1, 20897037), (3, 6965679), (7, 2985291), (9, 2321893), (21, 995097), (63, 331699), (409, 51093), (811, 25767), (1227, 17031), (2433, 8589), (2863, 7299), (3681, 5677)]