Q: What are the prime factors of the number 28,380,528?

 A: 2, 3, 11, 19, 23, 41

Why are those the prime factors of the number 28,380,528?

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 28,380,528

28,380,528
Factor Arrows
214,190,264
Factor Arrows
27,095,132
Factor Arrows
23,547,566
Factor Arrows
21,773,783
Factor Arrows
3591,261
Factor Arrows
3197,087
Factor Arrows
1117,917
Factor Arrows
19943
Factor Arrows
2341

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, 11, 19, 23, 41

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 11 x 19 x 23 x 41 = 28,380,528

This can also be written as 24 x 32 x 111 x 191 x 231 x 411 = 28,380,528

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


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