Q: What are the prime factors of the number 131,242,000?

 A: 2, 5, 211, 311

Why are those the prime factors of the number 131,242,000?

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 131,242,000

131,242,000
Factor Arrows
265,621,000
Factor Arrows
232,810,500
Factor Arrows
216,405,250
Factor Arrows
28,202,625
Factor Arrows
51,640,525
Factor Arrows
5328,105
Factor Arrows
565,621
Factor Arrows
211311

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, 5, 211, 311

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 5 x 5 x 211 x 311 = 131,242,000

This can also be written as 24 x 53 x 2111 x 3111 = 131,242,000

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


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