Q: What are the prime factors of the number 105,640,626?

 A: 2, 3, 7, 13, 163, 1187

Why are those the prime factors of the number 105,640,626?

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 105,640,626

105,640,626
Factor Arrows
252,820,313
Factor Arrows
317,606,771
Factor Arrows
72,515,253
Factor Arrows
13193,481
Factor Arrows
1631,187

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, 7, 13, 163, 1187

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 13 x 163 x 1,187 = 105,640,626

This can also be written as 21 x 31 x 71 x 131 x 1631 x 1,1871 = 105,640,626

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


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