Q: What are the prime factors of the number 193,920?

 A: 2, 3, 5, 101

Why are those the prime factors of the number 193,920?

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 193,920

193,920
Factor Arrows
296,960
Factor Arrows
248,480
Factor Arrows
224,240
Factor Arrows
212,120
Factor Arrows
26,060
Factor Arrows
23,030
Factor Arrows
21,515
Factor Arrows
3505
Factor Arrows
5101

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, 101

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 5 x 101 = 193,920

This can also be written as 27 x 31 x 51 x 1011 = 193,920

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


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