21636080

素因数分解:

$2^4\times 5^1\times {\mathrm{270451}}^1$

素因数の和:270464

約数の個数: 20

約数和(自身を含む): 50304072

約数和(自身を除く): 28667992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270451, 540902, 1081804, 1352255, 2163608, 2704510, 4327216, 5409020, 10818040, 21636080]

約数ペア:

[(1, 21636080), (2, 10818040), (4, 5409020), (5, 4327216), (8, 2704510), (10, 2163608), (16, 1352255), (20, 1081804), (40, 540902), (80, 270451)]