18985671

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{7561}}^1$

素因数の和:7604

約数の個数: 20

約数和(自身を含む): 29280064

約数和(自身を除く): 10294393

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 7561, 22683, 68049, 204147, 234391, 612441, 703173, 2109519, 6328557, 18985671]

約数ペア:

[(1, 18985671), (3, 6328557), (9, 2109519), (27, 703173), (31, 612441), (81, 234391), (93, 204147), (279, 68049), (837, 22683), (2511, 7561)]