If the prime factorizations have no factors in common, the LCM is the product of them.
If the prime factorizations have no prime factors in common, the numbers are relatively prime.
Prime factorization of 40 = 2x2x2x5 Prime factorization of 100 = 2x2x5x5
You do a factor rainbow to find a prime factorization. You compare prime factorizations to find a greatest common factor.
Variables don't have prime factorizations.
Negative numbers don't have prime factorizations.
2 is already prime; no factorization.
If the prime factorizations contain no factors in common (their GCF is 1), the numbers are relatively prime.
Negative numbers don't have prime factorizations.
Negative numbers don't have prime factorizations.
Negative numbers don't have prime factorizations.
Negative numbers don't have prime factorizations.