Q: What are the prime factors of the number 20,078,592?

 A: 2, 3, 19, 43

Why are those the prime factors of the number 20,078,592?

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 20,078,592

20,078,592
Factor Arrows
210,039,296
Factor Arrows
25,019,648
Factor Arrows
22,509,824
Factor Arrows
21,254,912
Factor Arrows
2627,456
Factor Arrows
2313,728
Factor Arrows
2156,864
Factor Arrows
278,432
Factor Arrows
239,216
Factor Arrows
219,608
Factor Arrows
29,804
Factor Arrows
24,902
Factor Arrows
22,451
Factor Arrows
3817
Factor Arrows
1943

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, 19, 43

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 2 x 2 x 3 x 19 x 43 = 20,078,592

This can also be written as 213 x 31 x 191 x 431 = 20,078,592

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


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