Q: What are the prime factors of the number 247,868,154?

 A: 2, 3, 1109, 4139

Why are those the prime factors of the number 247,868,154?

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 247,868,154

247,868,154
Factor Arrows
2123,934,077
Factor Arrows
341,311,359
Factor Arrows
313,770,453
Factor Arrows
34,590,151
Factor Arrows
1,1094,139

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, 1109, 4139

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 1,109 x 4,139 = 247,868,154

This can also be written as 21 x 33 x 1,1091 x 4,1391 = 247,868,154

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


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