21172412

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{311359}}^1$

素因数の和:311380

約数の個数: 12

約数和(自身を含む): 39231360

約数和(自身を除く): 18058948

約数列:

[1, 2, 4, 17, 34, 68, 311359, 622718, 1245436, 5293103, 10586206, 21172412]

約数ペア:

[(1, 21172412), (2, 10586206), (4, 5293103), (17, 1245436), (34, 622718), (68, 311359)]