Q: What are the prime factors of the number 331,210,320?

 A: 2, 3, 5, 7, 17, 11597

Why are those the prime factors of the number 331,210,320?

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 331,210,320

331,210,320
Factor Arrows
2165,605,160
Factor Arrows
282,802,580
Factor Arrows
241,401,290
Factor Arrows
220,700,645
Factor Arrows
36,900,215
Factor Arrows
51,380,043
Factor Arrows
7197,149
Factor Arrows
1711,597

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, 17, 11597

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 7 x 17 x 11,597 = 331,210,320

This can also be written as 24 x 31 x 51 x 71 x 171 x 11,5971 = 331,210,320

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


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