Q: What are the prime factors of the number 162,653,568?

 A: 2, 3, 7, 11, 5501

Why are those the prime factors of the number 162,653,568?

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 162,653,568

162,653,568
Factor Arrows
281,326,784
Factor Arrows
240,663,392
Factor Arrows
220,331,696
Factor Arrows
210,165,848
Factor Arrows
25,082,924
Factor Arrows
22,541,462
Factor Arrows
21,270,731
Factor Arrows
3423,577
Factor Arrows
760,511
Factor Arrows
115,501

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, 7, 11, 5501

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 7 x 11 x 5,501 = 162,653,568

This can also be written as 27 x 31 x 71 x 111 x 5,5011 = 162,653,568

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


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