ƯC (16;60) (18;77) (18;90) (18;30;42) (26;39;48)

Ta có:

`16=2^4`

`60=2².3.5`

`⇒ ƯCLN(16,60)=2²=4`

`⇒ƯC (16,60)=Ư(4)={1;2;4}`




Ta có:

`18=2.3²`

`77=7.11`

`⇒ ƯCLN(18,77)=1`

`⇒ƯC (18,77)=Ư(1)={1}`




Ta có:

`18=2.3²`

`30=2.3.5`

`42=2.4.7`

`⇒ ƯCLN(18,30,42)=2`

`⇒ƯC (18,30,42)=Ư(2)={1;2}`




Ta có:

`26=2.13`

`39=3.13`

`48=2^4 . 3`

`⇒ ƯCLN(26;39;48)=1`

`⇒ƯC (26;39;48)=Ư(1)={1}`