40808080

素因数分解:

$2^4\times 5^1\times {\mathrm{510101}}^1$

素因数の和:510114

約数の個数: 20

約数和(自身を含む): 94878972

約数和(自身を除く): 54070892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 510101, 1020202, 2040404, 2550505, 4080808, 5101010, 8161616, 10202020, 20404040, 40808080]

約数ペア:

[(1, 40808080), (2, 20404040), (4, 10202020), (5, 8161616), (8, 5101010), (10, 4080808), (16, 2550505), (20, 2040404), (40, 1020202), (80, 510101)]