**The prime factors of 50 are 2 and 5, with the rest of its factors not being prime numbers.** A factor is any number that can be divided evenly into the base number of interest, but only some factors are also prime numbers.

Determining all the prime factors of a number requires determining all the factors of that number first. All of the factors of 50 are 1, 2, 5, 10, 25 and 50. A prime number is any number that only has factors of 1 and itself. Of these numbers, only 2 and 5 are prime numbers, as 1 is not considered a prime number.