Q: What are the prime factors of the number 42,740,200?

 A: 2, 5, 29, 7369

Why are those the prime factors of the number 42,740,200?

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 42,740,200

42,740,200
Factor Arrows
221,370,100
Factor Arrows
210,685,050
Factor Arrows
25,342,525
Factor Arrows
51,068,505
Factor Arrows
5213,701
Factor Arrows
297,369

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, 29, 7369

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 5 x 5 x 29 x 7,369 = 42,740,200

This can also be written as 23 x 52 x 291 x 7,3691 = 42,740,200

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


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