405128660

素因数分解:

$2^2\times 5^1\times {\mathrm{20256433}}^1$

素因数の和:20256442

約数の個数: 12

約数和(自身を含む): 850770228

約数和(自身を除く): 445641568

約数列:

[1, 2, 4, 5, 10, 20, 20256433, 40512866, 81025732, 101282165, 202564330, 405128660]

約数ペア:

[(1, 405128660), (2, 202564330), (4, 101282165), (5, 81025732), (10, 40512866), (20, 20256433)]