Q: What are the prime factors of the number 664,223,247?

 A: 3, 41, 71, 313

Why are those the prime factors of the number 664,223,247?

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 664,223,247

664,223,247
Factor Arrows
3221,407,749
Factor Arrows
373,802,583
Factor Arrows
324,600,861
Factor Arrows
38,200,287
Factor Arrows
32,733,429
Factor Arrows
3911,143
Factor Arrows
4122,223
Factor Arrows
71313

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:

3, 41, 71, 313

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 3 x 41 x 71 x 313 = 664,223,247

This can also be written as 36 x 411 x 711 x 3131 = 664,223,247

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


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