Q: What are the prime factors of the number 322,387,520?

 A: 2, 5, 7, 13, 11071

Why are those the prime factors of the number 322,387,520?

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 322,387,520

322,387,520
Factor Arrows
2161,193,760
Factor Arrows
280,596,880
Factor Arrows
240,298,440
Factor Arrows
220,149,220
Factor Arrows
210,074,610
Factor Arrows
25,037,305
Factor Arrows
51,007,461
Factor Arrows
7143,923
Factor Arrows
1311,071

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, 7, 13, 11071

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 5 x 7 x 13 x 11,071 = 322,387,520

This can also be written as 26 x 51 x 71 x 131 x 11,0711 = 322,387,520

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


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