20287701

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7489}}^1$

素因数の和:7545

約数の個数: 24

約数和(自身を含む): 34274240

約数和(自身を除く): 13986539

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7489, 22467, 52423, 67401, 157269, 322027, 471807, 966081, 2254189, 2898243, 6762567, 20287701]

約数ペア:

[(1, 20287701), (3, 6762567), (7, 2898243), (9, 2254189), (21, 966081), (43, 471807), (63, 322027), (129, 157269), (301, 67401), (387, 52423), (903, 22467), (2709, 7489)]