Q: What are the prime factors of the number 120,244,432?

 A: 2, 7, 11, 73, 191

Why are those the prime factors of the number 120,244,432?

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 120,244,432

120,244,432
Factor Arrows
260,122,216
Factor Arrows
230,061,108
Factor Arrows
215,030,554
Factor Arrows
27,515,277
Factor Arrows
71,073,611
Factor Arrows
7153,373
Factor Arrows
1113,943
Factor Arrows
73191

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, 7, 11, 73, 191

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 7 x 7 x 11 x 73 x 191 = 120,244,432

This can also be written as 24 x 72 x 111 x 731 x 1911 = 120,244,432

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


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