The common factors of 20 and 38 are: 1 and 2
The common factors of 28 and 38 are 1 and 2.The factors of 38 are 1, 2, 19, and 38The factors of 28 are 1, 2, 4, 7, 14, and 28The common factors of 38 and 28 are 1 and 2The GCF (Greatest Common Factor) of 38 and 28 is 2
-38
Factors of 38: 1, 2, 19, 38. Factors of 42: 1, 2, 3, 6, 7, 14, 21, 42. GCF (38, 42) = 2
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 38 are 1, 2, 19, and 38. The GCF of 42 and 38 is 2.
1, 2, 7, 14, 19, 38, 133, 266 -1, -2, -7, -14, -19, -38, -133, -266
Mr. Natoli says do it yourself
1, 2, 7, 14, 19, 38, 133, 266
1, 2, 7, 14, 19, 38, 133, 266
No because they are composite numbers with more than two factors
Pay attention, this is how to do it. Prime factors of 14: 2*7 Prime factors of 38: 2*19 There are two 2's in both sets of prime factors, so only use one. 2*7*9=266=LCM
The solution to the factorization - the factors are 1, 2, 19, 38