Q: What are the prime factors of the number 31,325,130?

 A: 2, 3, 5, 4297

Why are those the prime factors of the number 31,325,130?

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 31,325,130

31,325,130
Factor Arrows
215,662,565
Factor Arrows
35,220,855
Factor Arrows
31,740,285
Factor Arrows
3580,095
Factor Arrows
3193,365
Factor Arrows
364,455
Factor Arrows
321,485
Factor Arrows
54,297

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, 5, 4297

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 5 x 4,297 = 31,325,130

This can also be written as 21 x 36 x 51 x 4,2971 = 31,325,130

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


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