Q: What are the prime factors of the number 162,360?

 A: 2, 3, 5, 11, 41

Why are those the prime factors of the number 162,360?

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 162,360

162,360
Factor Arrows
281,180
Factor Arrows
240,590
Factor Arrows
220,295
Factor Arrows
36,765
Factor Arrows
32,255
Factor Arrows
5451
Factor Arrows
1141

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, 41

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 11 x 41 = 162,360

This can also be written as 23 x 32 x 51 x 111 x 411 = 162,360

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


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