Q: What are the prime factors of the number 328,125,824?

 A: 2, 13, 31, 6361

Why are those the prime factors of the number 328,125,824?

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 328,125,824

328,125,824
Factor Arrows
2164,062,912
Factor Arrows
282,031,456
Factor Arrows
241,015,728
Factor Arrows
220,507,864
Factor Arrows
210,253,932
Factor Arrows
25,126,966
Factor Arrows
22,563,483
Factor Arrows
13197,191
Factor Arrows
316,361

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, 13, 31, 6361

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 2 x 13 x 31 x 6,361 = 328,125,824

This can also be written as 27 x 131 x 311 x 6,3611 = 328,125,824

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


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