19998111475

素因数分解:

$5^2\times {\mathrm{1559}}^1\times {\mathrm{513101}}^1$

素因数の和:514670

約数の個数: 12

約数和(自身を含む): 24813612720

約数和(自身を除く): 4815501245

約数列:

[1, 5, 25, 1559, 7795, 38975, 513101, 2565505, 12827525, 799924459, 3999622295, 19998111475]

約数ペア:

[(1, 19998111475), (5, 3999622295), (25, 799924459), (1559, 12827525), (7795, 2565505), (38975, 513101)]