Q: What are the prime factors of the number 378,786,400?

 A: 2, 5, 29, 563

Why are those the prime factors of the number 378,786,400?

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 378,786,400

378,786,400
Factor Arrows
2189,393,200
Factor Arrows
294,696,600
Factor Arrows
247,348,300
Factor Arrows
223,674,150
Factor Arrows
211,837,075
Factor Arrows
52,367,415
Factor Arrows
5473,483
Factor Arrows
2916,327
Factor Arrows
29563

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, 29, 563

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 5 x 29 x 29 x 563 = 378,786,400

This can also be written as 25 x 52 x 292 x 5631 = 378,786,400

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


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