Q: What are the prime factors of the number 105,255,040?

 A: 2, 5, 11, 14951

Why are those the prime factors of the number 105,255,040?

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 105,255,040

105,255,040
Factor Arrows
252,627,520
Factor Arrows
226,313,760
Factor Arrows
213,156,880
Factor Arrows
26,578,440
Factor Arrows
23,289,220
Factor Arrows
21,644,610
Factor Arrows
2822,305
Factor Arrows
5164,461
Factor Arrows
1114,951

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, 14951

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5 x 11 x 14,951 = 105,255,040

This can also be written as 27 x 51 x 111 x 14,9511 = 105,255,040

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


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