Q: What are the prime factors of the number 131,245,056?

 A: 2, 3, 47, 101

Why are those the prime factors of the number 131,245,056?

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 131,245,056

131,245,056
Factor Arrows
265,622,528
Factor Arrows
232,811,264
Factor Arrows
216,405,632
Factor Arrows
28,202,816
Factor Arrows
24,101,408
Factor Arrows
22,050,704
Factor Arrows
21,025,352
Factor Arrows
2512,676
Factor Arrows
2256,338
Factor Arrows
2128,169
Factor Arrows
342,723
Factor Arrows
314,241
Factor Arrows
34,747
Factor Arrows
47101

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, 47, 101

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 2 x 2 x 2 x 3 x 3 x 3 x 47 x 101 = 131,245,056

This can also be written as 210 x 33 x 471 x 1011 = 131,245,056

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


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