Q: What are the prime factors of the number 12,327,390?

 A: 2, 3, 5, 19, 89

Why are those the prime factors of the number 12,327,390?

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 12,327,390

12,327,390
Factor Arrows
26,163,695
Factor Arrows
32,054,565
Factor Arrows
3684,855
Factor Arrows
3228,285
Factor Arrows
376,095
Factor Arrows
325,365
Factor Arrows
38,455
Factor Arrows
51,691
Factor Arrows
1989

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, 5, 19, 89

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 3 x 3 x 5 x 19 x 89 = 12,327,390

This can also be written as 21 x 36 x 51 x 191 x 891 = 12,327,390

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


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