找出每组数的最小公倍数：(i3@6l5n-i-r9P)?8v-M({5W
（1）4和8 5v*k/[.i7Z3Y(i3@6l5n-i-r9P)?8v-M({5W
（2）6和16 0T;o,^0?1z)K.[1q(i3@6l5n-i-r9P)?8v-M({5W
（3）4和5 0X6T0X.w*s(V9c(K*z(i3@6l5n-i-r9P)?8v-M({5W
（4）12和1 6y5j'K1])H0u2p(i3@6l5n-i-r9P)?8v-M({5W