\(a,ƯCLN\left(540,168\right)=12\\ \RightarrowƯC\left(540,168\right)=Ư\left(12\right)=\left\{-12;-6;-4;-3;-2;-1;1;2;3;4;6;12\right\}\\ b,ƯCLN\left(735,350\right)=35\\ \RightarrowƯC\left(735,350\right)=Ư\left(35\right)=\left\{-35;-7;-5;-1;1;5;7;35\right\}\)
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\(a.540=2^2.3^3.5\)
\(168=2^3.3.7\)
\(ƯCLN\left(540;168\right)=2^2.3=12\)
\(ƯC\left(540;168\right)=\left\{12;24;36;...\right\}\)
\(b.735=3.5.7^2\)
\(350=2.5^2.7\)
\(ƯCLN\left(735;350\right)=5.7=35\)
\(ƯC\left(735;350\right)=\left\{35;70;105;...\right\}\)
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