Q: What are the prime factors of the number 312,003,120?

 A: 2, 3, 5, 11, 13, 9091

Why are those the prime factors of the number 312,003,120?

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 312,003,120

312,003,120
Factor Arrows
2156,001,560
Factor Arrows
278,000,780
Factor Arrows
239,000,390
Factor Arrows
219,500,195
Factor Arrows
36,500,065
Factor Arrows
51,300,013
Factor Arrows
11118,183
Factor Arrows
139,091

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, 11, 13, 9091

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 11 x 13 x 9,091 = 312,003,120

This can also be written as 24 x 31 x 51 x 111 x 131 x 9,0911 = 312,003,120

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


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