question: private static int findClosest ( int desiredFactor , Set < Integer > factors ) { int bestFactor = 1 ; int bestDelta = desiredFactor ; for ( Integer factor : factors ) { int testDelta = Math . abs ( desiredFactor - factor ) ; if ( testDelta < bestDelta ) { bestDelta = testDelta ; bestFactor = factor ; } } return bestFactor ; }
target:  Finds the factor that is closest to the desired factor, from an ordered list of factors.