Q: What are the prime factors of the number 103,153,344?

 A: 2, 3, 7, 23, 47, 71

Why are those the prime factors of the number 103,153,344?

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 103,153,344

103,153,344
Factor Arrows
251,576,672
Factor Arrows
225,788,336
Factor Arrows
212,894,168
Factor Arrows
26,447,084
Factor Arrows
23,223,542
Factor Arrows
21,611,771
Factor Arrows
3537,257
Factor Arrows
776,751
Factor Arrows
233,337
Factor Arrows
4771

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, 7, 23, 47, 71

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 3 x 7 x 23 x 47 x 71 = 103,153,344

This can also be written as 26 x 31 x 71 x 231 x 471 x 711 = 103,153,344

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


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