20798942372

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{399979661}}^1$

素因数の和:399979678

約数の個数: 12

約数和(自身を含む): 39198006876

約数和(自身を除く): 18399064504

約数列:

[1, 2, 4, 13, 26, 52, 399979661, 799959322, 1599918644, 5199735593, 10399471186, 20798942372]

約数ペア:

[(1, 20798942372), (2, 10399471186), (4, 5199735593), (13, 1599918644), (26, 799959322), (52, 399979661)]