Q: What are the prime factors of the number 265,535,172?

 A: 2, 3, 7, 17, 71, 97

Why are those the prime factors of the number 265,535,172?

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 265,535,172

265,535,172
Factor Arrows
2132,767,586
Factor Arrows
266,383,793
Factor Arrows
322,127,931
Factor Arrows
37,375,977
Factor Arrows
32,458,659
Factor Arrows
3819,553
Factor Arrows
7117,079
Factor Arrows
176,887
Factor Arrows
7197

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, 17, 71, 97

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 3 x 3 x 7 x 17 x 71 x 97 = 265,535,172

This can also be written as 22 x 34 x 71 x 171 x 711 x 971 = 265,535,172

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


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