81111920

素因数分解:

$2^4\times 5^1\times {\mathrm{1013899}}^1$

素因数の和:1013912

約数の個数: 20

約数和(自身を含む): 188585400

約数和(自身を除く): 107473480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1013899, 2027798, 4055596, 5069495, 8111192, 10138990, 16222384, 20277980, 40555960, 81111920]

約数ペア:

[(1, 81111920), (2, 40555960), (4, 20277980), (5, 16222384), (8, 10138990), (10, 8111192), (16, 5069495), (20, 4055596), (40, 2027798), (80, 1013899)]