Fill in the Blanks Math chap 4Online version Divisibility, Prime, Composite, GCF, LCM by Miss Schulman 1 18 3x3x2x2x2 50 prime 3x2x2x2x2 60 composite 8 43 is a number . 72 is a number . The prime factorization of 36 is . The prime factorization of 48 is . The GCF of 72 and 80 is . The GCF of 36 and 18 is . The LCM of 10 and 50 is . The LCM of 20 and 30 is .