Q: What are the prime factors of the number 162,741,040?

 A: 2, 5, 7, 11, 29, 911

Why are those the prime factors of the number 162,741,040?

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 162,741,040

162,741,040
Factor Arrows
281,370,520
Factor Arrows
240,685,260
Factor Arrows
220,342,630
Factor Arrows
210,171,315
Factor Arrows
52,034,263
Factor Arrows
7290,609
Factor Arrows
1126,419
Factor Arrows
29911

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, 7, 11, 29, 911

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 7 x 11 x 29 x 911 = 162,741,040

This can also be written as 24 x 51 x 71 x 111 x 291 x 9111 = 162,741,040

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


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