Q: What are the prime factors of the number 511,834,400?

 A: 2, 5, 7, 11, 1187

Why are those the prime factors of the number 511,834,400?

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 511,834,400

511,834,400
Factor Arrows
2255,917,200
Factor Arrows
2127,958,600
Factor Arrows
263,979,300
Factor Arrows
231,989,650
Factor Arrows
215,994,825
Factor Arrows
53,198,965
Factor Arrows
5639,793
Factor Arrows
791,399
Factor Arrows
713,057
Factor Arrows
111,187

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, 5, 7, 11, 1187

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 5 x 7 x 7 x 11 x 1,187 = 511,834,400

This can also be written as 25 x 52 x 72 x 111 x 1,1871 = 511,834,400

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


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