Q: What are the prime factors of the number 47,720,547?

 A: 3, 7, 17, 2621

Why are those the prime factors of the number 47,720,547?

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 47,720,547

47,720,547
Factor Arrows
315,906,849
Factor Arrows
35,302,283
Factor Arrows
7757,469
Factor Arrows
1744,557
Factor Arrows
172,621

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, 17, 2621

We can check our work by multiplying all of the prime factors together: 3 x 3 x 7 x 17 x 17 x 2,621 = 47,720,547

This can also be written as 32 x 71 x 172 x 2,6211 = 47,720,547

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


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