19689561

素因数分解:

$3^8\times {\mathrm{3001}}^1$

素因数の和:3025

約数の個数: 18

約数和(自身を含む): 29542682

約数和(自身を除く): 9853121

約数列:

[1, 3, 9, 27, 81, 243, 729, 2187, 3001, 6561, 9003, 27009, 81027, 243081, 729243, 2187729, 6563187, 19689561]

約数ペア:

[(1, 19689561), (3, 6563187), (9, 2187729), (27, 729243), (81, 243081), (243, 81027), (729, 27009), (2187, 9003), (3001, 6561)]