Q: What are the prime factors of the number 140,305,500?

 A: 2, 3, 5, 19, 547

Why are those the prime factors of the number 140,305,500?

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 140,305,500

140,305,500
Factor Arrows
270,152,750
Factor Arrows
235,076,375
Factor Arrows
311,692,125
Factor Arrows
33,897,375
Factor Arrows
31,299,125
Factor Arrows
5259,825
Factor Arrows
551,965
Factor Arrows
510,393
Factor Arrows
19547

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, 19, 547

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 5 x 5 x 5 x 19 x 547 = 140,305,500

This can also be written as 22 x 33 x 53 x 191 x 5471 = 140,305,500

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


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