27 and 81 are a possibility. Also numbers like 5 and 10, 20 and 40.
81 and 10
12, 24, 120
12, 24, 1200
8M and 12M2
prime
4 and 6 6 and 8 Any time the two numbers have a common factor, their LCM will be less than the product because the common factor contributes to the LCM fewer times than it contributes to the product.
That happens when one of the numbers is a factor of the other.
14 and 28 are two even numbers between 10 and 30 whose greatest common factor is 14.
There are several possibilities of pairs of numbers whose greatest common factor is 18. 54 and 198 18 and 126 414 and 846 72 and 1422
29 and 4147
this is hard
16, 32 and 48
The GCF is 16.
12 and 20
16 and 8
In that case, one of the numbers is a multiple of the other.
27 = 3*936 = 4*945 = 5*927, 36, and 45 are three different numbers whose greatest common factor is 9.
7 and 14