Q: What are the prime factors of the number 1,762,640?

 A: 2, 5, 11, 2003

Why are those the prime factors of the number 1,762,640?

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 1,762,640

1,762,640
Factor Arrows
2881,320
Factor Arrows
2440,660
Factor Arrows
2220,330
Factor Arrows
2110,165
Factor Arrows
522,033
Factor Arrows
112,003

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, 2003

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 11 x 2,003 = 1,762,640

This can also be written as 24 x 51 x 111 x 2,0031 = 1,762,640

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


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