def lcm(a,b):
    x,y = a,b
    while True:
        r = a % b
        a = b
        b = r
        if r == 0:
            return x // a * y

N = int(input())
A = list(map(int,input().split()))
A.sort()
inf = 10 ** 6
C = 10 ** 5 + 1
dat = [inf] * C
count = [0] * C
for a in A:
    dat[a] = a
    count[a] += 1
era = [0] * C
d = [[] for _ in range(C)]
for i in range(2,C):
    if era[i] == 0:
        for j in range(i,C,i):
            era[j] = 1
        for j in range(i * 2,C,i):
            d[j].append(i)
        for j in range((C-1) // i,0,-1):
            #print(j,j * i)
            dat[j] = min(dat[j],dat[j * i])
ans = 0

for i in range(1,N):
    a = A[i]
    tmp = inf
    for j in d[a]:
        if dat[j] < a:
            c = lcm(a,dat[j])
            if c < tmp:
                tmp = c
    if count[a] > 1:
        if tmp > a:
            tmp = a
    if i == 0:
        c = A[0] * A[1]
        if c < tmp:
            tmp = c
    else:
        c = a * A[0]
        if c < tmp:
            tmp = c
    ans += tmp
print(ans)