Q: What are the prime factors of the number 100,505,460?

 A: 2, 3, 5, 11, 197, 773

Why are those the prime factors of the number 100,505,460?

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 100,505,460

100,505,460
Factor Arrows
250,252,730
Factor Arrows
225,126,365
Factor Arrows
38,375,455
Factor Arrows
51,675,091
Factor Arrows
11152,281
Factor Arrows
197773

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, 11, 197, 773

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 11 x 197 x 773 = 100,505,460

This can also be written as 22 x 31 x 51 x 111 x 1971 x 7731 = 100,505,460

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


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