Q: What are the prime factors of the number 47,439?

 A: 3, 7, 251

Why are those the prime factors of the number 47,439?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 47,439

47,439
Factor Arrows
315,813
Factor Arrows
35,271
Factor Arrows
31,757
Factor Arrows
7251

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

3, 7, 251

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 7 x 251 = 47,439

This can also be written as 33 x 71 x 2511 = 47,439

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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