Q: What are the prime factors of the number 781,335,855?

 A: 3, 5, 83, 103, 677

Why are those the prime factors of the number 781,335,855?

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 781,335,855

781,335,855
Factor Arrows
3260,445,285
Factor Arrows
386,815,095
Factor Arrows
328,938,365
Factor Arrows
55,787,673
Factor Arrows
8369,731
Factor Arrows
103677

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:

3, 5, 83, 103, 677

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 5 x 83 x 103 x 677 = 781,335,855

This can also be written as 33 x 51 x 831 x 1031 x 6771 = 781,335,855

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


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