Q: What are the prime factors of the number 102,123,120?

 A: 2, 3, 5, 11, 101, 383

Why are those the prime factors of the number 102,123,120?

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 102,123,120

102,123,120
Factor Arrows
251,061,560
Factor Arrows
225,530,780
Factor Arrows
212,765,390
Factor Arrows
26,382,695
Factor Arrows
32,127,565
Factor Arrows
5425,513
Factor Arrows
1138,683
Factor Arrows
101383

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, 101, 383

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 11 x 101 x 383 = 102,123,120

This can also be written as 24 x 31 x 51 x 111 x 1011 x 3831 = 102,123,120

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


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