81354800

素因数分解:

$2^4\times 5^2\times {\mathrm{203387}}^1$

素因数の和:203405

約数の個数: 30

約数和(自身を含む): 195455868

約数和(自身を除く): 114101068

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 203387, 406774, 813548, 1016935, 1627096, 2033870, 3254192, 4067740, 5084675, 8135480, 10169350, 16270960, 20338700, 40677400, 81354800]

約数ペア:

[(1, 81354800), (2, 40677400), (4, 20338700), (5, 16270960), (8, 10169350), (10, 8135480), (16, 5084675), (20, 4067740), (25, 3254192), (40, 2033870), (50, 1627096), (80, 1016935), (100, 813548), (200, 406774), (400, 203387)]