The Singing Hedgehog Guide to:
Prime Factors 3 - Tree Method
For the 'proper' tree method we write factor pairs, continuing to split non-primes until we are done. Again, we start with the the lowest prime that divides into the value.

    Example:    Find the product of the prime factors of 280

280 = 2 x 140

 2 is prime so we just split 140

 Both prime so we are finished

    So the answer is 2x2x2x5x7 [or 23x5x7] 

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