Răspuns:
Explicație pas cu pas:
[tex]\bf a )~~D_{12}=\{1,2,3,4,6,12\}[/tex]
[tex]\bf b)~~D_{13}=\{1,13\}[/tex]
[tex]\bf c)~~D_{20}=\{1,2,4,5,10,20\}[/tex]
[tex]\bf d)~~D_{25}=\{1,5,25\}[/tex]
[tex]\bf e)~~D_{36}=\{1,2,4,6,12,18,36\}[/tex]
[tex]\bf f)~~ D_{27}=\{1,3,9,27\}[/tex]
[tex]==pav38==[/tex]
