Q: What are the prime factors of the number 774,733,440?

 A: 2, 3, 5, 13, 31039

Why are those the prime factors of the number 774,733,440?

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 774,733,440

774,733,440
Factor Arrows
2387,366,720
Factor Arrows
2193,683,360
Factor Arrows
296,841,680
Factor Arrows
248,420,840
Factor Arrows
224,210,420
Factor Arrows
212,105,210
Factor Arrows
26,052,605
Factor Arrows
32,017,535
Factor Arrows
5403,507
Factor Arrows
1331,039

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, 5, 13, 31039

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 3 x 5 x 13 x 31,039 = 774,733,440

This can also be written as 27 x 31 x 51 x 131 x 31,0391 = 774,733,440

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


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