Q: What are the prime factors of the number 724,321,338?

 A: 2, 3, 13, 89, 103, 1013

Why are those the prime factors of the number 724,321,338?

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 724,321,338

724,321,338
Factor Arrows
2362,160,669
Factor Arrows
3120,720,223
Factor Arrows
139,286,171
Factor Arrows
89104,339
Factor Arrows
1031,013

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, 13, 89, 103, 1013

We can check our work by multiplying all of the prime factors together: 2 x 3 x 13 x 89 x 103 x 1,013 = 724,321,338

This can also be written as 21 x 31 x 131 x 891 x 1031 x 1,0131 = 724,321,338

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


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