Q: What are the prime factors of the number 61,909,500?

 A: 2, 3, 5, 149, 277

Why are those the prime factors of the number 61,909,500?

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 61,909,500

61,909,500
Factor Arrows
230,954,750
Factor Arrows
215,477,375
Factor Arrows
35,159,125
Factor Arrows
51,031,825
Factor Arrows
5206,365
Factor Arrows
541,273
Factor Arrows
149277

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, 149, 277

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 5 x 5 x 149 x 277 = 61,909,500

This can also be written as 22 x 31 x 53 x 1491 x 2771 = 61,909,500

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


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