Q: What are the prime factors of the number 770,616?

 A: 2, 3, 7, 11, 139

Why are those the prime factors of the number 770,616?

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 770,616

770,616
Factor Arrows
2385,308
Factor Arrows
2192,654
Factor Arrows
296,327
Factor Arrows
332,109
Factor Arrows
310,703
Factor Arrows
71,529
Factor Arrows
11139

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, 7, 11, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 7 x 11 x 139 = 770,616

This can also be written as 23 x 32 x 71 x 111 x 1391 = 770,616

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


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