Q: What are the prime factors of the number 122,414,240?

 A: 2, 5, 13, 229, 257

Why are those the prime factors of the number 122,414,240?

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 122,414,240

122,414,240
Factor Arrows
261,207,120
Factor Arrows
230,603,560
Factor Arrows
215,301,780
Factor Arrows
27,650,890
Factor Arrows
23,825,445
Factor Arrows
5765,089
Factor Arrows
1358,853
Factor Arrows
229257

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, 13, 229, 257

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 13 x 229 x 257 = 122,414,240

This can also be written as 25 x 51 x 131 x 2291 x 2571 = 122,414,240

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


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