8080180

素因数分解:

$2^2\times 5^1\times {\mathrm{404009}}^1$

素因数の和:404018

約数の個数: 12

約数和(自身を含む): 16968420

約数和(自身を除く): 8888240

約数列:

[1, 2, 4, 5, 10, 20, 404009, 808018, 1616036, 2020045, 4040090, 8080180]

約数ペア:

[(1, 8080180), (2, 4040090), (4, 2020045), (5, 1616036), (10, 808018), (20, 404009)]