Q: What are the prime factors of the number 555,940?

 A: 2, 5, 7, 11, 19

Why are those the prime factors of the number 555,940?

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 555,940

555,940
Factor Arrows
2277,970
Factor Arrows
2138,985
Factor Arrows
527,797
Factor Arrows
73,971
Factor Arrows
11361
Factor Arrows
1919

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, 11, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 7 x 11 x 19 x 19 = 555,940

This can also be written as 22 x 51 x 71 x 111 x 192 = 555,940

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


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