Q: What are the prime factors of the number 746,240?

 A: 2, 5, 11, 53

Why are those the prime factors of the number 746,240?

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 746,240

746,240
Factor Arrows
2373,120
Factor Arrows
2186,560
Factor Arrows
293,280
Factor Arrows
246,640
Factor Arrows
223,320
Factor Arrows
211,660
Factor Arrows
25,830
Factor Arrows
22,915
Factor Arrows
5583
Factor Arrows
1153

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, 11, 53

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 5 x 11 x 53 = 746,240

This can also be written as 28 x 51 x 111 x 531 = 746,240

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


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