Q: What are the prime factors of the number 302,120,400?

 A: 2, 3, 5, 223, 1129

Why are those the prime factors of the number 302,120,400?

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 302,120,400

302,120,400
Factor Arrows
2151,060,200
Factor Arrows
275,530,100
Factor Arrows
237,765,050
Factor Arrows
218,882,525
Factor Arrows
36,294,175
Factor Arrows
51,258,835
Factor Arrows
5251,767
Factor Arrows
2231,129

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, 5, 223, 1129

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 5 x 223 x 1,129 = 302,120,400

This can also be written as 24 x 31 x 52 x 2231 x 1,1291 = 302,120,400

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


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