2 x 2 x 3 x 3 x 19 = 684
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684
The factors from greatest to least are: 11,11,5,3,3. The smallest prime factor is 3. You can get a quick idea of this by the fact that the digital root (number that goes evenly into the sum off all digits) is 18 which is divisible by 3.
well.... first off you have to find the scale factor...
' 2 ' is the only even prime number.
You look for a factor, divide for that factor, then look for additional factors. Here is an example: factor 52. It is fairly obvious that one of the factors is 2 (any number that ends with 0, 2, 4, 6, 8 has 2 as a factor), so you divide 52 by 2: 52 = 2 x 26 Once again, 26 is an even number (a multiple of 2), so you split off another factor of 2: 52 = 2 x 2 x 13 13 is a prime number; but if you don't happen to know that, you can try dividing it by 2, 3, 5, or 7 (testing those numbers is sufficient for any one-digit or two-digit number). Since there are no further factors, that's the final solution.