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.
5 and 1
A factor can divide into its multiple evenly.
2 and 60 will divide evenly into 120.
1 and 2.
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
1 and 19.