21042695

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{1009}}^1$

素因数の和:1154

約数の個数: 16

約数和(自身を含む): 26130720

約数和(自身を除く): 5088025

約数列:

[1, 5, 43, 97, 215, 485, 1009, 4171, 5045, 20855, 43387, 97873, 216935, 489365, 4208539, 21042695]

約数ペア:

[(1, 21042695), (5, 4208539), (43, 489365), (97, 216935), (215, 97873), (485, 43387), (1009, 20855), (4171, 5045)]