Q: What are the prime factors of the number 7,428,576?

 A: 2, 3, 223, 347

Why are those the prime factors of the number 7,428,576?

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 7,428,576

7,428,576
Factor Arrows
23,714,288
Factor Arrows
21,857,144
Factor Arrows
2928,572
Factor Arrows
2464,286
Factor Arrows
2232,143
Factor Arrows
377,381
Factor Arrows
223347

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, 3, 223, 347

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 223 x 347 = 7,428,576

This can also be written as 25 x 31 x 2231 x 3471 = 7,428,576

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


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