1 and 13
1, 2, 4, 13, 26, 52.
The only numbers that divide 13 evenly (the factors of 13) are 1 and 13.This makes 13 a prime number.
These numbers divide into 15 evenly: 1 3 5 and 15.
1, 2, 4, 5, 10, and 20 divide evenly into 20.
5 & 17
13 and 23.
138 is composite because it is even and it is in a times table.Prime numbers are numbers like 2 and 13. They are numbers that are not divisible by any other numbers except 1 and themselves. The only numbers that evenly divide 2 are 1 and 2. The only numbers that evenly divide 13 are 1 and 13.
A factor can divide into its multiple evenly.
1, 2, 4, 13, 26, 52.
The only numbers that divide 13 evenly (the factors of 13) are 1 and 13.This makes 13 a prime number.
2 and 60 will divide evenly into 120.
1, 2, 7, 13, 14, 26, 91, 182
Apart from itself and 1, the only numbers that divide evenly into 221 are 13 and 17. Therefore, 221 = 13 x 17.
These numbers divide into 15 evenly: 1 3 5 and 15.
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.
divisors