Q: What are the prime factors of the number 85,785,810?

 A: 2, 3, 5, 11, 47, 5531

Why are those the prime factors of the number 85,785,810?

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 85,785,810

85,785,810
Factor Arrows
242,892,905
Factor Arrows
314,297,635
Factor Arrows
52,859,527
Factor Arrows
11259,957
Factor Arrows
475,531

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, 11, 47, 5531

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 11 x 47 x 5,531 = 85,785,810

This can also be written as 21 x 31 x 51 x 111 x 471 x 5,5311 = 85,785,810

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


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