Q: What are the prime factors of the number 531,776?

 A: 2, 7, 1187

Why are those the prime factors of the number 531,776?

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 531,776

531,776
Factor Arrows
2265,888
Factor Arrows
2132,944
Factor Arrows
266,472
Factor Arrows
233,236
Factor Arrows
216,618
Factor Arrows
28,309
Factor Arrows
71,187

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, 1187

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 7 x 1,187 = 531,776

This can also be written as 26 x 71 x 1,1871 = 531,776

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


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