Q: What are the prime factors of the number 71,410,416?

 A: 2, 3, 7, 11, 139

Why are those the prime factors of the number 71,410,416?

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 71,410,416

71,410,416
Factor Arrows
235,705,208
Factor Arrows
217,852,604
Factor Arrows
28,926,302
Factor Arrows
24,463,151
Factor Arrows
31,487,717
Factor Arrows
7212,531
Factor Arrows
1119,321
Factor Arrows
139139

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, 7, 11, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 7 x 11 x 139 x 139 = 71,410,416

This can also be written as 24 x 31 x 71 x 111 x 1392 = 71,410,416

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


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