Q: What are the prime factors of the number 720,725,248?

 A: 2, 61, 46153

Why are those the prime factors of the number 720,725,248?

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 720,725,248

720,725,248
Factor Arrows
2360,362,624
Factor Arrows
2180,181,312
Factor Arrows
290,090,656
Factor Arrows
245,045,328
Factor Arrows
222,522,664
Factor Arrows
211,261,332
Factor Arrows
25,630,666
Factor Arrows
22,815,333
Factor Arrows
6146,153

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, 61, 46153

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 2 x 2 x 61 x 46,153 = 720,725,248

This can also be written as 28 x 611 x 46,1531 = 720,725,248

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


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