Q: What are the prime factors of the number 121,023,000?

 A: 2, 3, 5, 7, 17, 113

Why are those the prime factors of the number 121,023,000?

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 121,023,000

121,023,000
Factor Arrows
260,511,500
Factor Arrows
230,255,750
Factor Arrows
215,127,875
Factor Arrows
35,042,625
Factor Arrows
31,680,875
Factor Arrows
5336,175
Factor Arrows
567,235
Factor Arrows
513,447
Factor Arrows
71,921
Factor Arrows
17113

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, 5, 7, 17, 113

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 5 x 5 x 5 x 7 x 17 x 113 = 121,023,000

This can also be written as 23 x 32 x 53 x 71 x 171 x 1131 = 121,023,000

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


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