Q: What are the prime factors of the number 194,560?

 A: 2, 5, 19

Why are those the prime factors of the number 194,560?

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 194,560

194,560
Factor Arrows
297,280
Factor Arrows
248,640
Factor Arrows
224,320
Factor Arrows
212,160
Factor Arrows
26,080
Factor Arrows
23,040
Factor Arrows
21,520
Factor Arrows
2760
Factor Arrows
2380
Factor Arrows
2190
Factor Arrows
295
Factor Arrows
519

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, 5, 19

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 2 x 2 x 2 x 2 x 5 x 19 = 194,560

This can also be written as 211 x 51 x 191 = 194,560

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


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