Q: What are the prime factors of the number 55,505,340?

 A: 2, 3, 5, 11, 17, 97

Why are those the prime factors of the number 55,505,340?

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 55,505,340

55,505,340
Factor Arrows
227,752,670
Factor Arrows
213,876,335
Factor Arrows
34,625,445
Factor Arrows
31,541,815
Factor Arrows
5308,363
Factor Arrows
1128,033
Factor Arrows
171,649
Factor Arrows
1797

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, 97

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 5 x 11 x 17 x 17 x 97 = 55,505,340

This can also be written as 22 x 32 x 51 x 111 x 172 x 971 = 55,505,340

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


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