81631640

素因数分解:

$2^3\times 5^1\times {\mathrm{2040791}}^1$

素因数の和:2040802

約数の個数: 16

約数和(自身を含む): 183671280

約数和(自身を除く): 102039640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2040791, 4081582, 8163164, 10203955, 16326328, 20407910, 40815820, 81631640]

約数ペア:

[(1, 81631640), (2, 40815820), (4, 20407910), (5, 16326328), (8, 10203955), (10, 8163164), (20, 4081582), (40, 2040791)]