81680225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{297019}}^1$

素因数の和:297040

約数の個数: 12

約数和(自身を含む): 110491440

約数和(自身を除く): 28811215

約数列:

[1, 5, 11, 25, 55, 275, 297019, 1485095, 3267209, 7425475, 16336045, 81680225]

約数ペア:

[(1, 81680225), (5, 16336045), (11, 7425475), (25, 3267209), (55, 1485095), (275, 297019)]