Q: What are the prime factors of the number 28,415,424?

 A: 2, 3, 147997

Why are those the prime factors of the number 28,415,424?

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 28,415,424

28,415,424
Factor Arrows
214,207,712
Factor Arrows
27,103,856
Factor Arrows
23,551,928
Factor Arrows
21,775,964
Factor Arrows
2887,982
Factor Arrows
2443,991
Factor Arrows
3147,997

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, 147997

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 3 x 147,997 = 28,415,424

This can also be written as 26 x 31 x 147,9971 = 28,415,424

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


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