5 & 17
5
1, 2, 4, 5, 10, and 20 divide evenly into 20.
1 and 13
1 2 7 14 49 and 98 all divide into 98 evenly.
69 = 3 * 23
The numbers that go into both 85 and 68 evenly are their common divisors. The divisors of 85 are 1, 5, 17, and 85, while the divisors of 68 are 1, 2, 4, 17, 34, and 68. The greatest common divisor (GCD) of 85 and 68 is 17, so the numbers that divide both evenly are 1 and 17.
A factor can divide into its multiple evenly.
2 and 60 will divide evenly into 120.
5
1, 2, 4, 5, 10, and 20 divide evenly into 20.
These are the numbers that divide into 28 evenly: 1, 2, 4, 7, 14, 28.
They are called factors or divisors.
divisors
1 and 19.
1 and 13
Any of its factors
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.