Q: What are the prime factors of the number 105,842,272?

 A: 2, 17, 53, 3671

Why are those the prime factors of the number 105,842,272?

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 105,842,272

105,842,272
Factor Arrows
252,921,136
Factor Arrows
226,460,568
Factor Arrows
213,230,284
Factor Arrows
26,615,142
Factor Arrows
23,307,571
Factor Arrows
17194,563
Factor Arrows
533,671

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, 17, 53, 3671

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 17 x 53 x 3,671 = 105,842,272

This can also be written as 25 x 171 x 531 x 3,6711 = 105,842,272

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


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