81406.00000000

素因数分解:

$2^4\times 5^1\times {\mathrm{497587}}^1$

素因数の和:497600

約数の個数: 20

約数和(自身を含む): 92551368

約数和(自身を除く): 52744408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 497587, 995174, 1990348, 2487935, 3980696, 4975870, 7961392, 9951740, 19903480, 39806960]

約数ペア:

[(1, 39806960), (2, 19903480), (4, 9951740), (5, 7961392), (8, 4975870), (10, 3980696), (16, 2487935), (20, 1990348), (40, 995174), (80, 497587)]