Q: What are the prime factors of the number 742,368?

 A: 2, 3, 11, 19, 37

Why are those the prime factors of the number 742,368?

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 742,368

742,368
Factor Arrows
2371,184
Factor Arrows
2185,592
Factor Arrows
292,796
Factor Arrows
246,398
Factor Arrows
223,199
Factor Arrows
37,733
Factor Arrows
11703
Factor Arrows
1937

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, 19, 37

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 11 x 19 x 37 = 742,368

This can also be written as 25 x 31 x 111 x 191 x 371 = 742,368

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


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