16808080

素因数分解:

$2^4\times 5^1\times {\mathrm{210101}}^1$

素因数の和:210114

約数の個数: 20

約数和(自身を含む): 39078972

約数和(自身を除く): 22270892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 210101, 420202, 840404, 1050505, 1680808, 2101010, 3361616, 4202020, 8404040, 16808080]

約数ペア:

[(1, 16808080), (2, 8404040), (4, 4202020), (5, 3361616), (8, 2101010), (10, 1680808), (16, 1050505), (20, 840404), (40, 420202), (80, 210101)]