the factors of 28 from least to greatest are 1,2 and 7
The prime factors of 28 are 2 and 7.
1,2,4,7,14,28
1, 2, 4, 7, 14, 28
1, 2, 4, 7, 14, 28
You need at least two numbers to find a GCF.
The factors of 56 are: 1, 2, 4, 7, 8, 14, 28, 56
Factors of 28... 1,2,4,7,14,28 Factors of 42... 1,2,3,6,7,14,21,42 GCF = 14
28
The greatest factors of any positive integers are the integers themselves. The GCF of 28 and 60 is 4.
28
There cannot be a greatest common factor (GCF) of just one number. To be common there need to be at least two numbers. If you find all the factors of two or more numbers, and you find some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor.