Q: What are the prime factors of the number 347,857,890?

 A: 2, 3, 5, 19, 499, 1223

Why are those the prime factors of the number 347,857,890?

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 347,857,890

347,857,890
Factor Arrows
2173,928,945
Factor Arrows
357,976,315
Factor Arrows
511,595,263
Factor Arrows
19610,277
Factor Arrows
4991,223

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, 19, 499, 1223

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 19 x 499 x 1,223 = 347,857,890

This can also be written as 21 x 31 x 51 x 191 x 4991 x 1,2231 = 347,857,890

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


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