Question: can 1 be the lcm?
Answer: LCM stands for Least Common Multiple. ... example: the multiples of 8 are 8, 16, 24, 32, 40, 48, 56... the factors of 8 are 1, 2, 4, 8. The term least common factor doesn't really make sense since the least common factor of any pair of numbers is 1.