Q: What are the prime factors of the number 257,541,724?

 A: 2, 11, 107, 4973

Why are those the prime factors of the number 257,541,724?

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 257,541,724

257,541,724
Factor Arrows
2128,770,862
Factor Arrows
264,385,431
Factor Arrows
115,853,221
Factor Arrows
11532,111
Factor Arrows
1074,973

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, 11, 107, 4973

We can check our work by multiplying all of the prime factors together: 2 x 2 x 11 x 11 x 107 x 4,973 = 257,541,724

This can also be written as 22 x 112 x 1071 x 4,9731 = 257,541,724

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


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