ABCD represents four different natural numbers, and a * b * c * d = 2709, then what is the maximum and minimum of a + B + C + D?

Decomposition quality factor
2709=3*3*7*43
You can think of a factor as 1
Because ABCD represents four different natural numbers
So combine the two smallest factors
So the four numbers are 1.7.9.43
So the minimum is 60
Combine 3 with the largest factor
So the four factors are 1.3.7.129
The maximum is 140

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