Q: What are the prime factors of the number 105,770,250?

 A: 2, 3, 5, 29, 1621

Why are those the prime factors of the number 105,770,250?

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 105,770,250

105,770,250
Factor Arrows
252,885,125
Factor Arrows
317,628,375
Factor Arrows
35,876,125
Factor Arrows
51,175,225
Factor Arrows
5235,045
Factor Arrows
547,009
Factor Arrows
291,621

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, 29, 1621

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 5 x 5 x 5 x 29 x 1,621 = 105,770,250

This can also be written as 21 x 32 x 53 x 291 x 1,6211 = 105,770,250

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


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