21077815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{937}}^1$

素因数の和:1362

約数の個数: 16

約数和(自身を含む): 27689760

約数和(自身を除く): 6611945

約数列:

[1, 5, 11, 55, 409, 937, 2045, 4499, 4685, 10307, 22495, 51535, 383233, 1916165, 4215563, 21077815]

約数ペア:

[(1, 21077815), (5, 4215563), (11, 1916165), (55, 383233), (409, 51535), (937, 22495), (2045, 10307), (4499, 4685)]