81008080

素因数分解:

$2^4\times 5^1\times {\mathrm{1012601}}^1$

素因数の和:1012614

約数の個数: 20

約数和(自身を含む): 188343972

約数和(自身を除く): 107335892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1012601, 2025202, 4050404, 5063005, 8100808, 10126010, 16201616, 20252020, 40504040, 81008080]

約数ペア:

[(1, 81008080), (2, 40504040), (4, 20252020), (5, 16201616), (8, 10126010), (10, 8100808), (16, 5063005), (20, 4050404), (40, 2025202), (80, 1012601)]