You are probably looking for the prime factors in the number 50. This means all of the numbers which are prime, meaning they can only be divided by themselves and one which can be multiplied together to get 50.
Here are some examples of ways to factor 50
50 is equal to 25x2
In this case 2 is a prime number but 25 is not so we have to factor further.
50 is equal to 10x5
in this case 5 is prime but 10 is not so we will have to factor further
50 is equal to 2x5x5
All 3 numbers when multiplied give the number 50. All 3 numbers are prime.