Q: What are the prime factors of the number 68,346,180?

 A: 2, 3, 5, 7, 41

Why are those the prime factors of the number 68,346,180?

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 68,346,180

68,346,180
Factor Arrows
234,173,090
Factor Arrows
217,086,545
Factor Arrows
35,695,515
Factor Arrows
31,898,505
Factor Arrows
3632,835
Factor Arrows
3210,945
Factor Arrows
370,315
Factor Arrows
514,063
Factor Arrows
72,009
Factor Arrows
7287
Factor Arrows
741

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, 41

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 3 x 5 x 7 x 7 x 7 x 41 = 68,346,180

This can also be written as 22 x 35 x 51 x 73 x 411 = 68,346,180

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


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