def sumPropDiv(n): """returns sum of proper divisors of n""" dSum = 0 for x in range(1, n/2 + 1): if n % x == 0: dSum += x return dSum def amicSum(number): """finds the sum of all amicable numbers less than number, with number greater than 4.""" answer = 0 for x in range(4, number): if sumPropDiv(x) > 4: if sumPropDiv(sumPropDiv(x)) == x and sumPropDiv(x) != x: answer += x print x, "and", sumPropDiv(x), "are an amicable pair." return answer print amicSum(10000)
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