81286640

素因数分解:

$2^4\times 5^1\times {\mathrm{1016083}}^1$

素因数の和:1016096

約数の個数: 20

約数和(自身を含む): 188991624

約数和(自身を除く): 107704984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1016083, 2032166, 4064332, 5080415, 8128664, 10160830, 16257328, 20321660, 40643320, 81286640]

約数ペア:

[(1, 81286640), (2, 40643320), (4, 20321660), (5, 16257328), (8, 10160830), (10, 8128664), (16, 5080415), (20, 4064332), (40, 2032166), (80, 1016083)]