Q: What are the prime factors of the number 531,563,550?

 A: 2, 3, 5, 7, 506251

Why are those the prime factors of the number 531,563,550?

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 531,563,550

531,563,550
Factor Arrows
2265,781,775
Factor Arrows
388,593,925
Factor Arrows
517,718,785
Factor Arrows
53,543,757
Factor Arrows
7506,251

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, 7, 506251

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 5 x 7 x 506,251 = 531,563,550

This can also be written as 21 x 31 x 52 x 71 x 506,2511 = 531,563,550

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


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