Q: What are the prime factors of the number 106,163,640?

 A: 2, 3, 5, 11, 17, 19, 83

Why are those the prime factors of the number 106,163,640?

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 106,163,640

106,163,640
Factor Arrows
253,081,820
Factor Arrows
226,540,910
Factor Arrows
213,270,455
Factor Arrows
34,423,485
Factor Arrows
31,474,495
Factor Arrows
5294,899
Factor Arrows
1126,809
Factor Arrows
171,577
Factor Arrows
1983

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, 11, 17, 19, 83

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 11 x 17 x 19 x 83 = 106,163,640

This can also be written as 23 x 32 x 51 x 111 x 171 x 191 x 831 = 106,163,640

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


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