Q: What are the prime factors of the number 705,115,040?

 A: 2, 5, 7, 629567

Why are those the prime factors of the number 705,115,040?

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 705,115,040

705,115,040
Factor Arrows
2352,557,520
Factor Arrows
2176,278,760
Factor Arrows
288,139,380
Factor Arrows
244,069,690
Factor Arrows
222,034,845
Factor Arrows
54,406,969
Factor Arrows
7629,567

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, 629567

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 7 x 629,567 = 705,115,040

This can also be written as 25 x 51 x 71 x 629,5671 = 705,115,040

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


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