Q: What are the prime factors of the number 7,873,280?

 A: 2, 5, 6151

Why are those the prime factors of the number 7,873,280?

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 7,873,280

7,873,280
Factor Arrows
23,936,640
Factor Arrows
21,968,320
Factor Arrows
2984,160
Factor Arrows
2492,080
Factor Arrows
2246,040
Factor Arrows
2123,020
Factor Arrows
261,510
Factor Arrows
230,755
Factor Arrows
56,151

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, 6151

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 x 6,151 = 7,873,280

This can also be written as 28 x 51 x 6,1511 = 7,873,280

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


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