Q: What are the prime factors of the number 29,777,760?

 A: 2, 3, 5, 61, 113

Why are those the prime factors of the number 29,777,760?

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 29,777,760

29,777,760
Factor Arrows
214,888,880
Factor Arrows
27,444,440
Factor Arrows
23,722,220
Factor Arrows
21,861,110
Factor Arrows
2930,555
Factor Arrows
3310,185
Factor Arrows
3103,395
Factor Arrows
334,465
Factor Arrows
56,893
Factor Arrows
61113

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, 61, 113

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 5 x 61 x 113 = 29,777,760

This can also be written as 25 x 33 x 51 x 611 x 1131 = 29,777,760

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


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