Q: What are the prime factors of the number 308,323,400?

 A: 2, 5, 7, 11, 20021

Why are those the prime factors of the number 308,323,400?

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 308,323,400

308,323,400
Factor Arrows
2154,161,700
Factor Arrows
277,080,850
Factor Arrows
238,540,425
Factor Arrows
57,708,085
Factor Arrows
51,541,617
Factor Arrows
7220,231
Factor Arrows
1120,021

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, 20021

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 20,021 = 308,323,400

This can also be written as 23 x 52 x 71 x 111 x 20,0211 = 308,323,400

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


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