N = int(input())
A = list(map(int,input().split()))
M = 100000
B = [0] * (M + 1)
m = min(A)

for a in A:
  B[a] += 1

ans = 0
for a in range(1,M + 1):
  if B[a] == 0:
    continue
  ans += a * (B[a] - 1)
  B[a] = 1

for a in range(2,M + 1):
  if B[a] == 0:
    continue
  for i in range(2,M + 1):
    if a * i > M:
      break
    if B[a * i]:
      B[a * i] = 0
      ans += a * i
for a in range(m + 1,M + 1):
  if B[a]:
    ans += a * m
print(ans)