Q: What are the prime factors of the number 1,939,392?

 A: 2, 3, 7, 13, 37

Why are those the prime factors of the number 1,939,392?

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 1,939,392

1,939,392
Factor Arrows
2969,696
Factor Arrows
2484,848
Factor Arrows
2242,424
Factor Arrows
2121,212
Factor Arrows
260,606
Factor Arrows
230,303
Factor Arrows
310,101
Factor Arrows
33,367
Factor Arrows
7481
Factor Arrows
1337

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, 7, 13, 37

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 3 x 3 x 7 x 13 x 37 = 1,939,392

This can also be written as 26 x 32 x 71 x 131 x 371 = 1,939,392

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


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