Q: What are the prime factors of the number 81,485,785?

 A: 5, 59, 281, 983

Why are those the prime factors of the number 81,485,785?

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 81,485,785

81,485,785
Factor Arrows
516,297,157
Factor Arrows
59276,223
Factor Arrows
281983

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:

5, 59, 281, 983

We can check our work by multiplying all of the prime factors together: 5 x 59 x 281 x 983 = 81,485,785

This can also be written as 51 x 591 x 2811 x 9831 = 81,485,785

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


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