Q: What are the prime factors of the number 255,501,400?

 A: 2, 5, 7, 11, 47, 353

Why are those the prime factors of the number 255,501,400?

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 255,501,400

255,501,400
Factor Arrows
2127,750,700
Factor Arrows
263,875,350
Factor Arrows
231,937,675
Factor Arrows
56,387,535
Factor Arrows
51,277,507
Factor Arrows
7182,501
Factor Arrows
1116,591
Factor Arrows
47353

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, 7, 11, 47, 353

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 7 x 11 x 47 x 353 = 255,501,400

This can also be written as 23 x 52 x 71 x 111 x 471 x 3531 = 255,501,400

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


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