215391717

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{156421}}^1$

素因数の和:156450

約数の個数: 20

約数和(自身を含む): 340687116

約数和(自身を除く): 125295399

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 156421, 469263, 1407789, 2659157, 4223367, 7977471, 12670101, 23932413, 71797239, 215391717]

約数ペア:

[(1, 215391717), (3, 71797239), (9, 23932413), (17, 12670101), (27, 7977471), (51, 4223367), (81, 2659157), (153, 1407789), (459, 469263), (1377, 156421)]