80720

素因数分解:

$2^4\times 5^1\times {\mathrm{1009}}^1$

素因数の和:1022

約数の個数: 20

約数和(自身を含む): 187860

約数和(自身を除く): 107140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1009, 2018, 4036, 5045, 8072, 10090, 16144, 20180, 40360, 80720]

約数ペア:

[(1, 80720), (2, 40360), (4, 20180), (5, 16144), (8, 10090), (10, 8072), (16, 5045), (20, 4036), (40, 2018), (80, 1009)]