20661891

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{4481}}^1$

素因数の和:4566

約数の個数: 16

約数和(自身を含む): 29043360

約数和(自身を除く): 8381469

約数列:

[1, 3, 29, 53, 87, 159, 1537, 4481, 4611, 13443, 129949, 237493, 389847, 712479, 6887297, 20661891]

約数ペア:

[(1, 20661891), (3, 6887297), (29, 712479), (53, 389847), (87, 237493), (159, 129949), (1537, 13443), (4481, 4611)]