Q: What are the prime factors of the number 68,890,625?

 A: 5, 4409

Why are those the prime factors of the number 68,890,625?

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 68,890,625

68,890,625
Factor Arrows
513,778,125
Factor Arrows
52,755,625
Factor Arrows
5551,125
Factor Arrows
5110,225
Factor Arrows
522,045
Factor Arrows
54,409

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:

5, 4409

We can check our work by multiplying all of the prime factors together: 5 x 5 x 5 x 5 x 5 x 5 x 4,409 = 68,890,625

This can also be written as 56 x 4,4091 = 68,890,625

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


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