Răspuns :
[tex]\it D_{36}=\{\pm1,\ \ \pm2,\ \ \pm3,\ \ \pm4,\ \ \pm6,\ \ \pm9, \ \ \pm12,\ \ \pm18,\ \ \pm36\}\\ \\ D_{14}=\{\pm1,\ \ \pm2,\ \ \pm7,\ \ \pm14\}\\ \\ D_{56}=\{\pm1,\ \ \pm2,\ \ \pm4,\ \ \pm7,\ \ \pm8,\ \ \pm14,\ \ \pm28,\ \ \pm56\}[/tex]