9980287820

素因数分解:

$2^2\times 5^1\times {\mathrm{499014391}}^1$

素因数の和:499014400

約数の個数: 12

約数和(自身を含む): 20958604464

約数和(自身を除く): 10978316644

約数列:

[1, 2, 4, 5, 10, 20, 499014391, 998028782, 1996057564, 2495071955, 4990143910, 9980287820]

約数ペア:

[(1, 9980287820), (2, 4990143910), (4, 2495071955), (5, 1996057564), (10, 998028782), (20, 499014391)]