Q: What are the prime factors of the number 123,200,406?

 A: 2, 3, 7, 101, 461

Why are those the prime factors of the number 123,200,406?

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 123,200,406

123,200,406
Factor Arrows
261,600,203
Factor Arrows
320,533,401
Factor Arrows
36,844,467
Factor Arrows
32,281,489
Factor Arrows
7325,927
Factor Arrows
746,561
Factor Arrows
101461

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, 101, 461

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 7 x 7 x 101 x 461 = 123,200,406

This can also be written as 21 x 33 x 72 x 1011 x 4611 = 123,200,406

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


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