81800360

素因数分解:

$2^3\times 5^1\times {\mathrm{2045009}}^1$

素因数の和:2045020

約数の個数: 16

約数和(自身を含む): 184050900

約数和(自身を除く): 102250540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2045009, 4090018, 8180036, 10225045, 16360072, 20450090, 40900180, 81800360]

約数ペア:

[(1, 81800360), (2, 40900180), (4, 20450090), (5, 16360072), (8, 10225045), (10, 8180036), (20, 4090018), (40, 2045009)]