Q: What are the prime factors of the number 811,630,000?

 A: 2, 5, 81163

Why are those the prime factors of the number 811,630,000?

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 811,630,000

811,630,000
Factor Arrows
2405,815,000
Factor Arrows
2202,907,500
Factor Arrows
2101,453,750
Factor Arrows
250,726,875
Factor Arrows
510,145,375
Factor Arrows
52,029,075
Factor Arrows
5405,815
Factor Arrows
581,163

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, 81163

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 5 x 5 x 5 x 81,163 = 811,630,000

This can also be written as 24 x 54 x 81,1631 = 811,630,000

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


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