□■□ ■□■□■□ ■□■□■□

¯

■□■□■□ lcm ( a , b ) = ( a b ) gcd ( a , b ) ■□■□■□

■□■□■□ 1 2 3 three 4 four 5 ■□■□■□

■□■□■□ 1 2 3 three 4 four 5 ■□■□■□