Q: What are the prime factors of the number 862,257?

 A: 3, 11, 17, 29, 53

Why are those the prime factors of the number 862,257?

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 862,257

862,257
Factor Arrows
3287,419
Factor Arrows
1126,129
Factor Arrows
171,537
Factor Arrows
2953

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:

3, 11, 17, 29, 53

We can check our work by multiplying all of the prime factors together: 3 x 11 x 17 x 29 x 53 = 862,257

This can also be written as 31 x 111 x 171 x 291 x 531 = 862,257

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


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