21216845

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7591}}^1$

素因数の和:7652

約数の個数: 16

約数和(自身を含む): 28060032

約数和(自身を除く): 6843187

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7591, 37955, 98683, 326413, 493415, 1632065, 4243369, 21216845]

約数ペア:

[(1, 21216845), (5, 4243369), (13, 1632065), (43, 493415), (65, 326413), (215, 98683), (559, 37955), (2795, 7591)]