16561989

素因数分解:

$3^4\times {\mathrm{139}}^1\times {\mathrm{1471}}^1$

素因数の和:1622

約数の個数: 20

約数和(自身を含む): 24935680

約数和(自身を除く): 8373691

約数列:

[1, 3, 9, 27, 81, 139, 417, 1251, 1471, 3753, 4413, 11259, 13239, 39717, 119151, 204469, 613407, 1840221, 5520663, 16561989]

約数ペア:

[(1, 16561989), (3, 5520663), (9, 1840221), (27, 613407), (81, 204469), (139, 119151), (417, 39717), (1251, 13239), (1471, 11259), (3753, 4413)]