Q: What are the prime factors of the number 31,046,750?

 A: 2, 5, 7, 113, 157

Why are those the prime factors of the number 31,046,750?

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 31,046,750

31,046,750
Factor Arrows
215,523,375
Factor Arrows
53,104,675
Factor Arrows
5620,935
Factor Arrows
5124,187
Factor Arrows
717,741
Factor Arrows
113157

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, 5, 7, 113, 157

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 5 x 7 x 113 x 157 = 31,046,750

This can also be written as 21 x 53 x 71 x 1131 x 1571 = 31,046,750

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


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