Q: What are the prime factors of the number 770,032,640?

 A: 2, 5, 13, 23, 503

Why are those the prime factors of the number 770,032,640?

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 770,032,640

770,032,640
Factor Arrows
2385,016,320
Factor Arrows
2192,508,160
Factor Arrows
296,254,080
Factor Arrows
248,127,040
Factor Arrows
224,063,520
Factor Arrows
212,031,760
Factor Arrows
26,015,880
Factor Arrows
23,007,940
Factor Arrows
21,503,970
Factor Arrows
2751,985
Factor Arrows
5150,397
Factor Arrows
1311,569
Factor Arrows
23503

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, 5, 13, 23, 503

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 5 x 13 x 23 x 503 = 770,032,640

This can also be written as 210 x 51 x 131 x 231 x 5031 = 770,032,640

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


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