Q: What are the prime factors of the number 245,043,120?

 A: 2, 3, 5, 7, 67, 311

Why are those the prime factors of the number 245,043,120?

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 245,043,120

245,043,120
Factor Arrows
2122,521,560
Factor Arrows
261,260,780
Factor Arrows
230,630,390
Factor Arrows
215,315,195
Factor Arrows
35,105,065
Factor Arrows
51,021,013
Factor Arrows
7145,859
Factor Arrows
720,837
Factor Arrows
67311

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, 7, 67, 311

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 7 x 7 x 67 x 311 = 245,043,120

This can also be written as 24 x 31 x 51 x 72 x 671 x 3111 = 245,043,120

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


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