Q: What are the prime factors of the number 746,801,640?

 A: 2, 3, 5, 13, 43, 1237

Why are those the prime factors of the number 746,801,640?

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 746,801,640

746,801,640
Factor Arrows
2373,400,820
Factor Arrows
2186,700,410
Factor Arrows
293,350,205
Factor Arrows
331,116,735
Factor Arrows
310,372,245
Factor Arrows
33,457,415
Factor Arrows
5691,483
Factor Arrows
1353,191
Factor Arrows
431,237

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, 13, 43, 1237

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 5 x 13 x 43 x 1,237 = 746,801,640

This can also be written as 23 x 33 x 51 x 131 x 431 x 1,2371 = 746,801,640

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


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