5. A={x∈NI x = divizor al lui 48};
D₄₈={1,2,3,4,6,8,12,16,24,26,48}
A={1,2,3,4,6,8,12,16,24,26,48}
B={x∈NI x = divizor al lui 24};
D₂₄={1,2,3,4,6,8,12,24}
deci B={1,2,3,4,6,8,12,24}
C={x∈NI x = divizor al lui 169};
D₁₆₉={1,13,169}
deci
C={1,13,169}
D={x∈NI x = divizor al lui 84};
D₈₄={1,2,3,4,6,7,12,21,28,42,84}
deci
D={1,2,3,4,6,7,12,21,28,42,84}
