Day 8 of 1 Month Plan

Hey! I am currently working on Day 8 of the one-month plan, and I am struggling to use the prime factorization to find the greatest/least even/odd GCF and greatest/least even/odd LCM. I am not struggling to find the number of even/odd GCF and LCM because I figured out the formula for that. ( I like formulas to piece it together). Is there a formula to apply this to find the greatest/least even/odd GCF/LCM???