20013981

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{30187}}^1$

素因数の和:30220

約数の個数: 16

約数和(自身を含む): 30429504

約数和(自身を除く): 10415523

約数列:

[1, 3, 13, 17, 39, 51, 221, 663, 30187, 90561, 392431, 513179, 1177293, 1539537, 6671327, 20013981]

約数ペア:

[(1, 20013981), (3, 6671327), (13, 1539537), (17, 1177293), (39, 513179), (51, 392431), (221, 90561), (663, 30187)]