81608080

素因数分解:

$2^4\times 5^1\times {\mathrm{1020101}}^1$

素因数の和:1020114

約数の個数: 20

約数和(自身を含む): 189738972

約数和(自身を除く): 108130892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1020101, 2040202, 4080404, 5100505, 8160808, 10201010, 16321616, 20402020, 40804040, 81608080]

約数ペア:

[(1, 81608080), (2, 40804040), (4, 20402020), (5, 16321616), (8, 10201010), (10, 8160808), (16, 5100505), (20, 4080404), (40, 2040202), (80, 1020101)]