Ta có : \(432=2^4.3^3\)
\(720=2^4.3^2.5\)
ƯCLN(432;720) = 24 .32 = 144
ƯC(432;720) ={ 1;2;3;4;...;144}
Ta có :
432 = 24 . 33
720 = 24 . 32 . 5
ƯCLN ( 432; 720 ) = 24 . 32 = 144
ƯC ( 432 ; 720 ) = Ư( 144) = { 1; 2; 3; 4; 8; 9; 12; 16; 18; 36; 72; 144 }