Q: What are the prime factors of the number 743,424?

 A: 2, 3, 11

Why are those the prime factors of the number 743,424?

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 743,424

743,424
Factor Arrows
2371,712
Factor Arrows
2185,856
Factor Arrows
292,928
Factor Arrows
246,464
Factor Arrows
223,232
Factor Arrows
211,616
Factor Arrows
25,808
Factor Arrows
22,904
Factor Arrows
21,452
Factor Arrows
2726
Factor Arrows
2363
Factor Arrows
3121
Factor Arrows
1111

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, 11

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 2 x 3 x 11 x 11 = 743,424

This can also be written as 211 x 31 x 112 = 743,424

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


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