Q: What are the prime factors of the number 19,687,392?

 A: 2, 3, 197, 347

Why are those the prime factors of the number 19,687,392?

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 19,687,392

19,687,392
Factor Arrows
29,843,696
Factor Arrows
24,921,848
Factor Arrows
22,460,924
Factor Arrows
21,230,462
Factor Arrows
2615,231
Factor Arrows
3205,077
Factor Arrows
368,359
Factor Arrows
197347

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, 197, 347

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 197 x 347 = 19,687,392

This can also be written as 25 x 32 x 1971 x 3471 = 19,687,392

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


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