Q: What are the prime factors of the number 30,774,450?

 A: 2, 3, 5, 7, 53, 79

Why are those the prime factors of the number 30,774,450?

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 30,774,450

30,774,450
Factor Arrows
215,387,225
Factor Arrows
35,129,075
Factor Arrows
51,025,815
Factor Arrows
5205,163
Factor Arrows
729,309
Factor Arrows
74,187
Factor Arrows
5379

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, 7, 53, 79

We can check our work by multiplying all of the prime factors together: 2 x 3 x 5 x 5 x 7 x 7 x 53 x 79 = 30,774,450

This can also be written as 21 x 31 x 52 x 72 x 531 x 791 = 30,774,450

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


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