Q: What are the prime factors of the number 771,584?

 A: 2, 11, 137

Why are those the prime factors of the number 771,584?

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 771,584

771,584
Factor Arrows
2385,792
Factor Arrows
2192,896
Factor Arrows
296,448
Factor Arrows
248,224
Factor Arrows
224,112
Factor Arrows
212,056
Factor Arrows
26,028
Factor Arrows
23,014
Factor Arrows
21,507
Factor Arrows
11137

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, 11, 137

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 11 x 137 = 771,584

This can also be written as 29 x 111 x 1371 = 771,584

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


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