Q: What are the prime factors of the number 121,401,600?

 A: 2, 3, 5, 6323

Why are those the prime factors of the number 121,401,600?

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 121,401,600

121,401,600
Factor Arrows
260,700,800
Factor Arrows
230,350,400
Factor Arrows
215,175,200
Factor Arrows
27,587,600
Factor Arrows
23,793,800
Factor Arrows
21,896,900
Factor Arrows
2948,450
Factor Arrows
2474,225
Factor Arrows
3158,075
Factor Arrows
531,615
Factor Arrows
56,323

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, 6323

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 5 x 6,323 = 121,401,600

This can also be written as 28 x 31 x 52 x 6,3231 = 121,401,600

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


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