Q: What are the prime factors of the number 120,206,450?

 A: 2, 5, 7, 13, 29, 911

Why are those the prime factors of the number 120,206,450?

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 120,206,450

120,206,450
Factor Arrows
260,103,225
Factor Arrows
512,020,645
Factor Arrows
52,404,129
Factor Arrows
7343,447
Factor Arrows
1326,419
Factor Arrows
29911

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, 7, 13, 29, 911

We can check our work by multiplying all of the prime factors together: 2 x 5 x 5 x 7 x 13 x 29 x 911 = 120,206,450

This can also be written as 21 x 52 x 71 x 131 x 291 x 9111 = 120,206,450

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


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