Q: What are the prime factors of the number 816,270?

 A: 2, 3, 5, 7, 13, 23

Why are those the prime factors of the number 816,270?

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 816,270

816,270
Factor Arrows
2408,135
Factor Arrows
3136,045
Factor Arrows
527,209
Factor Arrows
73,887
Factor Arrows
13299
Factor Arrows
1323

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, 7, 13, 23

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 7 x 13 x 13 x 23 = 816,270

This can also be written as 21 x 31 x 51 x 71 x 132 x 231 = 816,270

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


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