Q: What are the prime factors of the number 73,042,432?

 A: 2, 331, 431

Why are those the prime factors of the number 73,042,432?

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 73,042,432

73,042,432
Factor Arrows
236,521,216
Factor Arrows
218,260,608
Factor Arrows
29,130,304
Factor Arrows
24,565,152
Factor Arrows
22,282,576
Factor Arrows
21,141,288
Factor Arrows
2570,644
Factor Arrows
2285,322
Factor Arrows
2142,661
Factor Arrows
331431

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, 331, 431

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 2 x 2 x 2 x 331 x 431 = 73,042,432

This can also be written as 29 x 3311 x 4311 = 73,042,432

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


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