20839905

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{14939}}^1$

素因数の和:14981

約数の個数: 24

約数和(自身を含む): 37290240

約数和(自身を除く): 16450335

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 155, 279, 465, 1395, 14939, 44817, 74695, 134451, 224085, 463109, 672255, 1389327, 2315545, 4167981, 6946635, 20839905]

約数ペア:

[(1, 20839905), (3, 6946635), (5, 4167981), (9, 2315545), (15, 1389327), (31, 672255), (45, 463109), (93, 224085), (155, 134451), (279, 74695), (465, 44817), (1395, 14939)]