Q: What are the prime factors of the number 820,192?

 A: 2, 19, 71

Why are those the prime factors of the number 820,192?

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 820,192

820,192
Factor Arrows
2410,096
Factor Arrows
2205,048
Factor Arrows
2102,524
Factor Arrows
251,262
Factor Arrows
225,631
Factor Arrows
191,349
Factor Arrows
1971

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, 19, 71

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 19 x 19 x 71 = 820,192

This can also be written as 25 x 192 x 711 = 820,192

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


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