Q: What are the prime factors of the number 31,103,232?

 A: 2, 3, 40499

Why are those the prime factors of the number 31,103,232?

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 31,103,232

31,103,232
Factor Arrows
215,551,616
Factor Arrows
27,775,808
Factor Arrows
23,887,904
Factor Arrows
21,943,952
Factor Arrows
2971,976
Factor Arrows
2485,988
Factor Arrows
2242,994
Factor Arrows
2121,497
Factor Arrows
340,499

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, 40499

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 3 x 40,499 = 31,103,232

This can also be written as 28 x 31 x 40,4991 = 31,103,232

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


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