Q: What are the prime factors of the number 104,553,540?

 A: 2, 3, 5, 7, 13, 491

Why are those the prime factors of the number 104,553,540?

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 104,553,540

104,553,540
Factor Arrows
252,276,770
Factor Arrows
226,138,385
Factor Arrows
38,712,795
Factor Arrows
32,904,265
Factor Arrows
5580,853
Factor Arrows
782,979
Factor Arrows
136,383
Factor Arrows
13491

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, 7, 13, 491

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 7 x 13 x 13 x 491 = 104,553,540

This can also be written as 22 x 32 x 51 x 71 x 132 x 4911 = 104,553,540

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


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