Q: What are the prime factors of the number 256,384,800?

 A: 2, 3, 5, 7, 5087

Why are those the prime factors of the number 256,384,800?

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 256,384,800

256,384,800
Factor Arrows
2128,192,400
Factor Arrows
264,096,200
Factor Arrows
232,048,100
Factor Arrows
216,024,050
Factor Arrows
28,012,025
Factor Arrows
32,670,675
Factor Arrows
3890,225
Factor Arrows
5178,045
Factor Arrows
535,609
Factor Arrows
75,087

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, 5, 7, 5087

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 3 x 5 x 5 x 7 x 5,087 = 256,384,800

This can also be written as 25 x 32 x 52 x 71 x 5,0871 = 256,384,800

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


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