Q: What are the prime factors of the number 65,723,900?

 A: 2, 5, 11, 149, 401

Why are those the prime factors of the number 65,723,900?

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 65,723,900

65,723,900
Factor Arrows
232,861,950
Factor Arrows
216,430,975
Factor Arrows
53,286,195
Factor Arrows
5657,239
Factor Arrows
1159,749
Factor Arrows
149401

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, 11, 149, 401

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 5 x 11 x 149 x 401 = 65,723,900

This can also be written as 22 x 52 x 111 x 1491 x 4011 = 65,723,900

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


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