21516111

素因数分解:

$3^4\times {\mathrm{491}}^1\times {\mathrm{541}}^1$

素因数の和:1044

約数の個数: 20

約数和(自身を含む): 32266344

約数和(自身を除く): 10750233

約数列:

[1, 3, 9, 27, 81, 491, 541, 1473, 1623, 4419, 4869, 13257, 14607, 39771, 43821, 265631, 796893, 2390679, 7172037, 21516111]

約数ペア:

[(1, 21516111), (3, 7172037), (9, 2390679), (27, 796893), (81, 265631), (491, 43821), (541, 39771), (1473, 14607), (1623, 13257), (4419, 4869)]