Q: What are the prime factors of the number 747,640,764?

 A: 2, 3, 13, 29, 31, 1777

Why are those the prime factors of the number 747,640,764?

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 747,640,764

747,640,764
Factor Arrows
2373,820,382
Factor Arrows
2186,910,191
Factor Arrows
362,303,397
Factor Arrows
320,767,799
Factor Arrows
131,597,523
Factor Arrows
2955,087
Factor Arrows
311,777

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, 29, 31, 1777

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 13 x 29 x 31 x 1,777 = 747,640,764

This can also be written as 22 x 32 x 131 x 291 x 311 x 1,7771 = 747,640,764

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


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