Q: What are the prime factors of the number 352,640?

 A: 2, 5, 19, 29

Why are those the prime factors of the number 352,640?

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 352,640

352,640
Factor Arrows
2176,320
Factor Arrows
288,160
Factor Arrows
244,080
Factor Arrows
222,040
Factor Arrows
211,020
Factor Arrows
25,510
Factor Arrows
22,755
Factor Arrows
5551
Factor Arrows
1929

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, 19, 29

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 2 x 5 x 19 x 29 = 352,640

This can also be written as 27 x 51 x 191 x 291 = 352,640

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


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