Q: What are the prime factors of the number 25,762,240?

 A: 2, 5, 7, 31, 53

Why are those the prime factors of the number 25,762,240?

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 25,762,240

25,762,240
Factor Arrows
212,881,120
Factor Arrows
26,440,560
Factor Arrows
23,220,280
Factor Arrows
21,610,140
Factor Arrows
2805,070
Factor Arrows
2402,535
Factor Arrows
580,507
Factor Arrows
711,501
Factor Arrows
71,643
Factor Arrows
3153

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, 31, 53

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 7 x 7 x 31 x 53 = 25,762,240

This can also be written as 26 x 51 x 72 x 311 x 531 = 25,762,240

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


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