Q: What are the prime factors of the number 68,037,440?

 A: 2, 5, 173, 1229

Why are those the prime factors of the number 68,037,440?

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 68,037,440

68,037,440
Factor Arrows
234,018,720
Factor Arrows
217,009,360
Factor Arrows
28,504,680
Factor Arrows
24,252,340
Factor Arrows
22,126,170
Factor Arrows
21,063,085
Factor Arrows
5212,617
Factor Arrows
1731,229

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, 173, 1229

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 5 x 173 x 1,229 = 68,037,440

This can also be written as 26 x 51 x 1731 x 1,2291 = 68,037,440

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


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