Q: What are the prime factors of the number 71,113,504?

 A: 2, 7, 11, 19, 31

Why are those the prime factors of the number 71,113,504?

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 71,113,504

71,113,504
Factor Arrows
235,556,752
Factor Arrows
217,778,376
Factor Arrows
28,889,188
Factor Arrows
24,444,594
Factor Arrows
22,222,297
Factor Arrows
7317,471
Factor Arrows
745,353
Factor Arrows
76,479
Factor Arrows
11589
Factor Arrows
1931

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, 7, 11, 19, 31

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 7 x 7 x 11 x 19 x 31 = 71,113,504

This can also be written as 25 x 73 x 111 x 191 x 311 = 71,113,504

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


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