Q: What are the prime factors of the number 31,461,850?

 A: 2, 5, 7, 89891

Why are those the prime factors of the number 31,461,850?

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 31,461,850

31,461,850
Factor Arrows
215,730,925
Factor Arrows
53,146,185
Factor Arrows
5629,237
Factor Arrows
789,891

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, 89891

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 7 x 89,891 = 31,461,850

This can also be written as 21 x 52 x 71 x 89,8911 = 31,461,850

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


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