Q: What are the prime factors of the number 788,900?

 A: 2, 5, 7, 23

Why are those the prime factors of the number 788,900?

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 788,900

788,900
Factor Arrows
2394,450
Factor Arrows
2197,225
Factor Arrows
539,445
Factor Arrows
57,889
Factor Arrows
71,127
Factor Arrows
7161
Factor Arrows
723

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, 7, 23

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 7 x 7 x 7 x 23 = 788,900

This can also be written as 22 x 52 x 73 x 231 = 788,900

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


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