Determinati D a pentru a apartine {21, 154, 144, 1000}

Răspuns :

[tex]D_{21}=\{1,3,7,21\}[/tex]
[tex]D_{154}=\{1,2,7,11,14,22,77,154\}[/tex]
[tex]D_{144}=\{1,2,3,4,6,8,9,12,16,18,24,36,72,144\}[/tex]
[tex]D_{1000}=\{1,2,4,5,8,10,20,25,40,50,100,125,200,250,500,1000\}[/tex]