Q: What are the prime factors of the number 28,645,272?

 A: 2, 3, 17, 29, 269

Why are those the prime factors of the number 28,645,272?

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 28,645,272

28,645,272
Factor Arrows
214,322,636
Factor Arrows
27,161,318
Factor Arrows
23,580,659
Factor Arrows
31,193,553
Factor Arrows
3397,851
Factor Arrows
3132,617
Factor Arrows
177,801
Factor Arrows
29269

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, 17, 29, 269

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 17 x 29 x 269 = 28,645,272

This can also be written as 23 x 33 x 171 x 291 x 2691 = 28,645,272

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


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