Q: What are the prime factors of the number 725,761,512?

 A: 2, 3, 7, 37, 12973

Why are those the prime factors of the number 725,761,512?

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 725,761,512

725,761,512
Factor Arrows
2362,880,756
Factor Arrows
2181,440,378
Factor Arrows
290,720,189
Factor Arrows
330,240,063
Factor Arrows
310,080,021
Factor Arrows
33,360,007
Factor Arrows
7480,001
Factor Arrows
3712,973

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, 7, 37, 12973

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 7 x 37 x 12,973 = 725,761,512

This can also be written as 23 x 33 x 71 x 371 x 12,9731 = 725,761,512

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


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