Q: What are the prime factors of the number 66,201,400?

 A: 2, 5, 17, 19471

Why are those the prime factors of the number 66,201,400?

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 66,201,400

66,201,400
Factor Arrows
233,100,700
Factor Arrows
216,550,350
Factor Arrows
28,275,175
Factor Arrows
51,655,035
Factor Arrows
5331,007
Factor Arrows
1719,471

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, 17, 19471

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 17 x 19,471 = 66,201,400

This can also be written as 23 x 52 x 171 x 19,4711 = 66,201,400

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


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