Q: What are the prime factors of the number 855,858,200?

 A: 2, 5, 17, 211, 1193

Why are those the prime factors of the number 855,858,200?

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 855,858,200

855,858,200
Factor Arrows
2427,929,100
Factor Arrows
2213,964,550
Factor Arrows
2106,982,275
Factor Arrows
521,396,455
Factor Arrows
54,279,291
Factor Arrows
17251,723
Factor Arrows
2111,193

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, 211, 1193

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 17 x 211 x 1,193 = 855,858,200

This can also be written as 23 x 52 x 171 x 2111 x 1,1931 = 855,858,200

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


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