1
Every whole number has ' 1 ' as a factor, because ' 1 ' candivide evenly into every whole number.
The number 70 is divisible by 13, but not evenly.
1/13 is the highest number
Only 1 and 13; 13 is a prime number.
13 and 2
13
2730
Just the number one.
1638
13
Nothing goes into 13 evenly other than 1 and 13, so that means it is a prime number.
13.