Q: What are the prime factors of the number 105,506,400?

 A: 2, 3, 5, 43961

Why are those the prime factors of the number 105,506,400?

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 105,506,400

105,506,400
Factor Arrows
252,753,200
Factor Arrows
226,376,600
Factor Arrows
213,188,300
Factor Arrows
26,594,150
Factor Arrows
23,297,075
Factor Arrows
31,099,025
Factor Arrows
5219,805
Factor Arrows
543,961

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, 43961

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 5 x 5 x 43,961 = 105,506,400

This can also be written as 25 x 31 x 52 x 43,9611 = 105,506,400

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


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