81684920

素因数分解:

$2^3\times 5^1\times {\mathrm{2042123}}^1$

素因数の和:2042134

約数の個数: 16

約数和(自身を含む): 183791160

約数和(自身を除く): 102106240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2042123, 4084246, 8168492, 10210615, 16336984, 20421230, 40842460, 81684920]

約数ペア:

[(1, 81684920), (2, 40842460), (4, 20421230), (5, 16336984), (8, 10210615), (10, 8168492), (20, 4084246), (40, 2042123)]