Q: What are the prime factors of the number 85,136,000?

 A: 2, 5, 17, 313

Why are those the prime factors of the number 85,136,000?

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 85,136,000

85,136,000
Factor Arrows
242,568,000
Factor Arrows
221,284,000
Factor Arrows
210,642,000
Factor Arrows
25,321,000
Factor Arrows
22,660,500
Factor Arrows
21,330,250
Factor Arrows
2665,125
Factor Arrows
5133,025
Factor Arrows
526,605
Factor Arrows
55,321
Factor Arrows
17313

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, 17, 313

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 5 x 5 x 5 x 17 x 313 = 85,136,000

This can also be written as 27 x 53 x 171 x 3131 = 85,136,000

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


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