Q: What are the prime factors of the number 68,500,800?

 A: 2, 3, 5, 67, 71

Why are those the prime factors of the number 68,500,800?

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 68,500,800

68,500,800
Factor Arrows
234,250,400
Factor Arrows
217,125,200
Factor Arrows
28,562,600
Factor Arrows
24,281,300
Factor Arrows
22,140,650
Factor Arrows
21,070,325
Factor Arrows
3356,775
Factor Arrows
3118,925
Factor Arrows
523,785
Factor Arrows
54,757
Factor Arrows
6771

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, 67, 71

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 3 x 3 x 5 x 5 x 67 x 71 = 68,500,800

This can also be written as 26 x 32 x 52 x 671 x 711 = 68,500,800

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


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