Q: What are the prime factors of the number 310,403,340?

 A: 2, 3, 5, 13, 17

Why are those the prime factors of the number 310,403,340?

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 310,403,340

310,403,340
Factor Arrows
2155,201,670
Factor Arrows
277,600,835
Factor Arrows
325,866,945
Factor Arrows
38,622,315
Factor Arrows
32,874,105
Factor Arrows
3958,035
Factor Arrows
3319,345
Factor Arrows
563,869
Factor Arrows
134,913
Factor Arrows
17289
Factor Arrows
1717

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, 13, 17

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 x 13 x 17 x 17 x 17 = 310,403,340

This can also be written as 22 x 35 x 51 x 131 x 173 = 310,403,340

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


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