Q: What are the prime factors of the number 123,611,454?

 A: 2, 3, 17, 19, 373

Why are those the prime factors of the number 123,611,454?

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 123,611,454

123,611,454
Factor Arrows
261,805,727
Factor Arrows
320,601,909
Factor Arrows
36,867,303
Factor Arrows
32,289,101
Factor Arrows
17134,653
Factor Arrows
197,087
Factor Arrows
19373

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, 17, 19, 373

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 17 x 19 x 19 x 373 = 123,611,454

This can also be written as 21 x 33 x 171 x 192 x 3731 = 123,611,454

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


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