20379807

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{7523}}^1$

素因数の和:7579

約数の個数: 24

約数和(自身を含む): 34429824

約数和(自身を除く): 14050017

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 301, 387, 903, 2709, 7523, 22569, 52661, 67707, 157983, 323489, 473949, 970467, 2264423, 2911401, 6793269, 20379807]

約数ペア:

[(1, 20379807), (3, 6793269), (7, 2911401), (9, 2264423), (21, 970467), (43, 473949), (63, 323489), (129, 157983), (301, 67707), (387, 52661), (903, 22569), (2709, 7523)]