8720080

素因数分解:

$2^4\times 5^1\times {\mathrm{109001}}^1$

素因数の和:109014

約数の個数: 20

約数和(自身を含む): 20274372

約数和(自身を除く): 11554292

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109001, 218002, 436004, 545005, 872008, 1090010, 1744016, 2180020, 4360040, 8720080]

約数ペア:

[(1, 8720080), (2, 4360040), (4, 2180020), (5, 1744016), (8, 1090010), (10, 872008), (16, 545005), (20, 436004), (40, 218002), (80, 109001)]