Question: what is the least common prime factor of 35 and 91?
Answer: Alternatively, the lcm of 35 and 91 can be found using the prime factorization of 35 and 91: The prime factorization of 35 is: 5 x 7. The prime factorization of 91 is: 7 x 13. Eliminate the duplicate factors of the two lists, then multiply them once with the remaining factors of the lists to get lcm(35,35) = 455.