Q: What are the prime factors of the number 160,380?

 A: 2, 3, 5, 11

Why are those the prime factors of the number 160,380?

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 160,380

160,380
Factor Arrows
280,190
Factor Arrows
240,095
Factor Arrows
313,365
Factor Arrows
34,455
Factor Arrows
31,485
Factor Arrows
3495
Factor Arrows
3165
Factor Arrows
355
Factor Arrows
511

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

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 3 x 3 x 5 x 11 = 160,380

This can also be written as 22 x 36 x 51 x 111 = 160,380

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


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