Q: What are the prime factors of the number 155,515,133?

 A: 17, 19, 43, 11197

Why are those the prime factors of the number 155,515,133?

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 155,515,133

155,515,133
Factor Arrows
179,147,949
Factor Arrows
19481,471
Factor Arrows
4311,197

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:

17, 19, 43, 11197

We can check our work by multiplying all of the prime factors together: 17 x 19 x 43 x 11,197 = 155,515,133

This can also be written as 171 x 191 x 431 x 11,1971 = 155,515,133

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


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