Q: What are the prime factors of the number 31,540,224?

 A: 2, 3, 10267

Why are those the prime factors of the number 31,540,224?

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 31,540,224

31,540,224
Factor Arrows
215,770,112
Factor Arrows
27,885,056
Factor Arrows
23,942,528
Factor Arrows
21,971,264
Factor Arrows
2985,632
Factor Arrows
2492,816
Factor Arrows
2246,408
Factor Arrows
2123,204
Factor Arrows
261,602
Factor Arrows
230,801
Factor Arrows
310,267

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:

2, 3, 10267

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 10,267 = 31,540,224

This can also be written as 210 x 31 x 10,2671 = 31,540,224

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


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