Q: What are the prime factors of the number 731,317,650?

 A: 2, 3, 5, 7, 29, 47, 73

Why are those the prime factors of the number 731,317,650?

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 731,317,650

731,317,650
Factor Arrows
2365,658,825
Factor Arrows
3121,886,275
Factor Arrows
524,377,255
Factor Arrows
54,875,451
Factor Arrows
7696,493
Factor Arrows
799,499
Factor Arrows
293,431
Factor Arrows
4773

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, 5, 7, 29, 47, 73

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 5 x 7 x 7 x 29 x 47 x 73 = 731,317,650

This can also be written as 21 x 31 x 52 x 72 x 291 x 471 x 731 = 731,317,650

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


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