205120840

素因数分解:

$2^3\times 5^1\times {\mathrm{5128021}}^1$

素因数の和:5128032

約数の個数: 16

約数和(自身を含む): 461521980

約数和(自身を除く): 256401140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 5128021, 10256042, 20512084, 25640105, 41024168, 51280210, 102560420, 205120840]

約数ペア:

[(1, 205120840), (2, 102560420), (4, 51280210), (5, 41024168), (8, 25640105), (10, 20512084), (20, 10256042), (40, 5128021)]