Q: What are the prime factors of the number 173,256,768?

 A: 2, 3, 31, 313

Why are those the prime factors of the number 173,256,768?

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 173,256,768

173,256,768
Factor Arrows
286,628,384
Factor Arrows
243,314,192
Factor Arrows
221,657,096
Factor Arrows
210,828,548
Factor Arrows
25,414,274
Factor Arrows
22,707,137
Factor Arrows
3902,379
Factor Arrows
3300,793
Factor Arrows
319,703
Factor Arrows
31313

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, 31, 313

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 31 x 31 x 313 = 173,256,768

This can also be written as 26 x 32 x 312 x 3131 = 173,256,768

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


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