These are the numbers that divide into 28 evenly: 1, 2, 4, 7, 14, 28.
The greatest common factor of these numbers is 1. If it were a composite number, we could say that that number, and all the numbers that divide it evenly, divide these numbers evenly. However, these numbers are relatively prime-that is, the only factor they share is 1.
Any of its factors
10 can be divided evenly into 2 and 5, which are the factors of 10.
factors of 540 are 1,2,3,4,5,6,9,10,12,15,18,20,27,30,36,45,54,60,90,108,135,180,270,540
A factor can divide into its multiple evenly.
2 and 60 will divide evenly into 120.
1 and 19
57 is divisible by the prime numbers of 3 and 19
These are the numbers that divide into 28 evenly: 1, 2, 4, 7, 14, 28.
1, 2, 4, 5, 10, and 20 divide evenly into 20.
They are called factors or divisors.
divisors
The greatest common factor of these numbers is 1. If it were a composite number, we could say that that number, and all the numbers that divide it evenly, divide these numbers evenly. However, these numbers are relatively prime-that is, the only factor they share is 1.
Any of its factors
5 & 17
1 and 13