Q: What are the prime factors of the number 85,756,000?

 A: 2, 5, 11, 1949

Why are those the prime factors of the number 85,756,000?

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 85,756,000

85,756,000
Factor Arrows
242,878,000
Factor Arrows
221,439,000
Factor Arrows
210,719,500
Factor Arrows
25,359,750
Factor Arrows
22,679,875
Factor Arrows
5535,975
Factor Arrows
5107,195
Factor Arrows
521,439
Factor Arrows
111,949

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, 11, 1949

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 5 x 11 x 1,949 = 85,756,000

This can also be written as 25 x 53 x 111 x 1,9491 = 85,756,000

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


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