Q: What are the prime factors of the number 161,118,504?

 A: 2, 3, 239, 3121

Why are those the prime factors of the number 161,118,504?

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 161,118,504

161,118,504
Factor Arrows
280,559,252
Factor Arrows
240,279,626
Factor Arrows
220,139,813
Factor Arrows
36,713,271
Factor Arrows
32,237,757
Factor Arrows
3745,919
Factor Arrows
2393,121

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, 239, 3121

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 239 x 3,121 = 161,118,504

This can also be written as 23 x 33 x 2391 x 3,1211 = 161,118,504

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


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