Q: What are the prime factors of the number 71,506,240?

 A: 2, 5, 13, 17189

Why are those the prime factors of the number 71,506,240?

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 71,506,240

71,506,240
Factor Arrows
235,753,120
Factor Arrows
217,876,560
Factor Arrows
28,938,280
Factor Arrows
24,469,140
Factor Arrows
22,234,570
Factor Arrows
21,117,285
Factor Arrows
5223,457
Factor Arrows
1317,189

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, 13, 17189

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 5 x 13 x 17,189 = 71,506,240

This can also be written as 26 x 51 x 131 x 17,1891 = 71,506,240

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


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