Q: What are the prime factors of the number 120,355,368?

 A: 2, 3, 7, 53, 1931

Why are those the prime factors of the number 120,355,368?

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 120,355,368

120,355,368
Factor Arrows
260,177,684
Factor Arrows
230,088,842
Factor Arrows
215,044,421
Factor Arrows
35,014,807
Factor Arrows
7716,401
Factor Arrows
7102,343
Factor Arrows
531,931

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, 7, 53, 1931

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 7 x 7 x 53 x 1,931 = 120,355,368

This can also be written as 23 x 31 x 72 x 531 x 1,9311 = 120,355,368

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


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