18278541

素因数分解:

$3^4\times {\mathrm{113}}^1\times {\mathrm{1997}}^1$

素因数の和:2122

約数の個数: 20

約数和(自身を含む): 27560412

約数和(自身を除く): 9281871

約数列:

[1, 3, 9, 27, 81, 113, 339, 1017, 1997, 3051, 5991, 9153, 17973, 53919, 161757, 225661, 676983, 2030949, 6092847, 18278541]

約数ペア:

[(1, 18278541), (3, 6092847), (9, 2030949), (27, 676983), (81, 225661), (113, 161757), (339, 53919), (1017, 17973), (1997, 9153), (3051, 5991)]