20820815

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{857}}^1$

素因数の和:1018

約数の個数: 16

約数和(自身を含む): 25822368

約数和(自身を除く): 5001553

約数列:

[1, 5, 43, 113, 215, 565, 857, 4285, 4859, 24295, 36851, 96841, 184255, 484205, 4164163, 20820815]

約数ペア:

[(1, 20820815), (5, 4164163), (43, 484205), (113, 184255), (215, 96841), (565, 36851), (857, 24295), (4285, 4859)]