Q: What are the prime factors of the number 787,040?

 A: 2, 5, 4919

Why are those the prime factors of the number 787,040?

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 787,040

787,040
Factor Arrows
2393,520
Factor Arrows
2196,760
Factor Arrows
298,380
Factor Arrows
249,190
Factor Arrows
224,595
Factor Arrows
54,919

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, 4919

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 4,919 = 787,040

This can also be written as 25 x 51 x 4,9191 = 787,040

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


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