Vendor/phpspreadsheet/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Calculation/MathTrig.php
public static function LCM(...$args)
    {
        $returnValue = 1;
        $allPoweredFactors = [];
        // Loop through arguments
        foreach (Functions::flattenArray($args) as $value) {
            if (!is_numeric($value)) {
                return Functions::VALUE();
            }
            if ($value == 0) {
                return 0;
            } elseif ($value < 0) {
                return Functions::NAN();
            }
            $myFactors = self::factors(floor($value));
            $myCountedFactors = array_count_values($myFactors);
            $myPoweredFactors = [];
            foreach ($myCountedFactors as $myCountedFactor => $myCountedPower) {
                $myPoweredFactors[$myCountedFactor] = pow($myCountedFactor, $myCountedPower);
            }
            foreach ($myPoweredFactors as $myPoweredValue => $myPoweredFactor) {
                if (isset($allPoweredFactors[$myPoweredValue])) {
                    if ($allPoweredFactors[$myPoweredValue] < $myPoweredFactor) {
                        $allPoweredFactors[$myPoweredValue] = $myPoweredFactor;
                    }
                } else {
                    $allPoweredFactors[$myPoweredValue] = $myPoweredFactor;
                }
            }
        }
        foreach ($allPoweredFactors as $allPoweredFactor) {
            $returnValue *= (int) $allPoweredFactor;
        }

        return $returnValue;
    }
public static function LCM(...$args)
    {
        $returnValue = 1;
        $allPoweredFactors = [];
        // Loop through arguments
        foreach (Functions::flattenArray($args) as $value) {
            if (!is_numeric($value)) {
                return Functions::VALUE();
            }
            if ($value == 0) {
                return 0;
            } elseif ($value < 0) {
                return Functions::NAN();
            }
            $myFactors = self::factors(floor($value));
            $myCountedFactors = array_count_values($myFactors);
            $myPoweredFactors = [];
            foreach ($myCountedFactors as $myCountedFactor => $myCountedPower) {
                $myPoweredFactors[$myCountedFactor] = pow($myCountedFactor, $myCountedPower);
            }
            foreach ($myPoweredFactors as $myPoweredValue => $myPoweredFactor) {
                if (isset($allPoweredFactors[$myPoweredValue])) {
                    if ($allPoweredFactors[$myPoweredValue] < $myPoweredFactor) {
                        $allPoweredFactors[$myPoweredValue] = $myPoweredFactor;
                    }
                } else {
                    $allPoweredFactors[$myPoweredValue] = $myPoweredFactor;
                }
            }
        }
        foreach ($allPoweredFactors as $allPoweredFactor) {
            $returnValue *= (int) $allPoweredFactor;
        }

        return $returnValue;
    }
LCM.

Returns the lowest common multiplier of a series of numbers
The least common multiple is the smallest positive integer that is a multiple
of all integer arguments number1, number2, and so on. Use LCM to add fractions
with different denominators.

Excel Function:
LCM(number1[,number2[, ...]])

@category Mathematical and Trigonometric Functions

@param mixed ...$args Data values

@return int Lowest Common Multiplier