Q: What are the prime factors of the number 635,363,400?

 A: 2, 3, 5, 7, 21611

Why are those the prime factors of the number 635,363,400?

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 635,363,400

635,363,400
Factor Arrows
2317,681,700
Factor Arrows
2158,840,850
Factor Arrows
279,420,425
Factor Arrows
326,473,475
Factor Arrows
55,294,695
Factor Arrows
51,058,939
Factor Arrows
7151,277
Factor Arrows
721,611

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, 5, 7, 21611

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 5 x 7 x 7 x 21,611 = 635,363,400

This can also be written as 23 x 31 x 52 x 72 x 21,6111 = 635,363,400

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


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