Q: What are the prime factors of the number 557,536?

 A: 2, 7, 19, 131

Why are those the prime factors of the number 557,536?

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 557,536

557,536
Factor Arrows
2278,768
Factor Arrows
2139,384
Factor Arrows
269,692
Factor Arrows
234,846
Factor Arrows
217,423
Factor Arrows
72,489
Factor Arrows
19131

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, 7, 19, 131

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 19 x 131 = 557,536

This can also be written as 25 x 71 x 191 x 1311 = 557,536

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


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