common factors

# /*
#  * Given two numbers, find all factors of each.
#  * Return all of their common factors sorted from highest to lowest.
#  *
#  * Example 1:
#  *  Find all the common factors of 12 and 18.
#  *  Factors of 12 are 12, 6, 4, 3, 2, 1
#  *  Factors of 18 are 18, 9, 6, 3, 2, 1
#  *  The common factors of 12 and 18 are 6, 3, 2, 1
#  *
#  * Example 2:
#  *  var common = commonFactors(20, 25);
#  *  console.log(common); // [5, 1]
# */

x = 12
y = 18

def factorise(x, y):
    common = []
    for i in range(1, x):
        if x%i == y%i == 0 :
            common.append(i)
    return common

print factorise(x, y)

def common_factors(num1, num2):
    common = []
    for x in range(1, min(num1, num2)+1):
        if num1 % x == 0 and num2 % x == 0:
            common.insert(0,x)
    return common