Q: What are the prime factors of the number 103,103,232?

 A: 2, 3, 17, 53, 149

Why are those the prime factors of the number 103,103,232?

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 103,103,232

103,103,232
Factor Arrows
251,551,616
Factor Arrows
225,775,808
Factor Arrows
212,887,904
Factor Arrows
26,443,952
Factor Arrows
23,221,976
Factor Arrows
21,610,988
Factor Arrows
2805,494
Factor Arrows
2402,747
Factor Arrows
3134,249
Factor Arrows
177,897
Factor Arrows
53149

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, 17, 53, 149

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 17 x 53 x 149 = 103,103,232

This can also be written as 28 x 31 x 171 x 531 x 1491 = 103,103,232

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


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