First we need to find the prime factors of each number
Prime factors of six are 2 and 3
Prime factors of fourteen are 2 and 7
Now find the LCM (least common multiple) by multiplying
2 x 3 x 7 = 42
Now find all factors of 42
1, 2, 3, 6, 7, 14, 21, and 42 is your answer