Q: What are the prime factors of the number 76,941,760?

 A: 2, 5, 7, 701

Why are those the prime factors of the number 76,941,760?

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 76,941,760

76,941,760
Factor Arrows
238,470,880
Factor Arrows
219,235,440
Factor Arrows
29,617,720
Factor Arrows
24,808,860
Factor Arrows
22,404,430
Factor Arrows
21,202,215
Factor Arrows
5240,443
Factor Arrows
734,349
Factor Arrows
74,907
Factor Arrows
7701

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, 7, 701

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 5 x 7 x 7 x 7 x 701 = 76,941,760

This can also be written as 26 x 51 x 73 x 7011 = 76,941,760

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


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