Q: What are the prime factors of the number 38,399,946?

 A: 2, 3, 13, 43, 107

Why are those the prime factors of the number 38,399,946?

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 38,399,946

38,399,946
Factor Arrows
219,199,973
Factor Arrows
36,399,991
Factor Arrows
13492,307
Factor Arrows
4311,449
Factor Arrows
107107

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, 13, 43, 107

We can check our work by multiplying all of the prime factors together: 2 x 3 x 13 x 43 x 107 x 107 = 38,399,946

This can also be written as 21 x 31 x 131 x 431 x 1072 = 38,399,946

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


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