81004040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{155777}}^1$

素因数の和:155801

約数の個数: 32

約数和(自身を含む): 196280280

約数和(自身を除く): 115276240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 155777, 311554, 623108, 778885, 1246216, 1557770, 2025101, 3115540, 4050202, 6231080, 8100404, 10125505, 16200808, 20251010, 40502020, 81004040]

約数ペア:

[(1, 81004040), (2, 40502020), (4, 20251010), (5, 16200808), (8, 10125505), (10, 8100404), (13, 6231080), (20, 4050202), (26, 3115540), (40, 2025101), (52, 1557770), (65, 1246216), (104, 778885), (130, 623108), (260, 311554), (520, 155777)]