21175135

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{661}}^1$

素因数の和:858

約数の個数: 16

約数和(自身を含む): 26215200

約数和(自身を除く): 5040065

約数列:

[1, 5, 43, 149, 215, 661, 745, 3305, 6407, 28423, 32035, 98489, 142115, 492445, 4235027, 21175135]

約数ペア:

[(1, 21175135), (5, 4235027), (43, 492445), (149, 142115), (215, 98489), (661, 32035), (745, 28423), (3305, 6407)]