81657215

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{2549}}^1$

素因数の和:2746

約数の個数: 16

約数和(自身を含む): 100980000

約数和(自身を除く): 19322785

約数列:

[1, 5, 43, 149, 215, 745, 2549, 6407, 12745, 32035, 109607, 379801, 548035, 1899005, 16331443, 81657215]

約数ペア:

[(1, 81657215), (5, 16331443), (43, 1899005), (149, 548035), (215, 379801), (745, 109607), (2549, 32035), (6407, 12745)]