Q: What are the prime factors of the number 31,717,248?

 A: 2, 3, 151, 547

Why are those the prime factors of the number 31,717,248?

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 31,717,248

31,717,248
Factor Arrows
215,858,624
Factor Arrows
27,929,312
Factor Arrows
23,964,656
Factor Arrows
21,982,328
Factor Arrows
2991,164
Factor Arrows
2495,582
Factor Arrows
2247,791
Factor Arrows
382,597
Factor Arrows
151547

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, 151, 547

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 3 x 151 x 547 = 31,717,248

This can also be written as 27 x 31 x 1511 x 5471 = 31,717,248

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


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