Q: What are the prime factors of the number 7,255,520?

 A: 2, 5, 137, 331

Why are those the prime factors of the number 7,255,520?

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 7,255,520

7,255,520
Factor Arrows
23,627,760
Factor Arrows
21,813,880
Factor Arrows
2906,940
Factor Arrows
2453,470
Factor Arrows
2226,735
Factor Arrows
545,347
Factor Arrows
137331

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, 137, 331

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 137 x 331 = 7,255,520

This can also be written as 25 x 51 x 1371 x 3311 = 7,255,520

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


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