Q: What are the prime factors of the number 770,720?

 A: 2, 5, 4817

Why are those the prime factors of the number 770,720?

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 770,720

770,720
Factor Arrows
2385,360
Factor Arrows
2192,680
Factor Arrows
296,340
Factor Arrows
248,170
Factor Arrows
224,085
Factor Arrows
54,817

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, 5, 4817

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 4,817 = 770,720

This can also be written as 25 x 51 x 4,8171 = 770,720

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


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