# Original solution

import os
import sys
from io import BytesIO, IOBase


def main():
    n = int(eval(input()))
    arr = list(map(int, input().split()))
    arr.sort()
    d = {}
    ans = 0
    s1 = 0
    d = {i: 0 for i in range(1, 10 ** 6 + 1)}
    for i in arr:
        if i == 1:
            s1 += 1
        d[i] += 1
    if s1 != 0:
        if s1 > 1:
            print((0))
            quit()
        else:
            print((1))
            quit()
    for i in range(n):
        x = arr[i]
        if d[x] == 1:
            f = 1
            for j in range(2, int(x ** 0.5) + 1):
                y = x // j
                if (d[j] >= 1 and x % j == 0) or (d[y] >= 1 and x % (y) == 0):
                    f = 0
                    break
            if f == 1:
                ans += 1
    print(ans)


# fast-io region

BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")


sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)


def input():
    return sys.stdin.readline().rstrip("\r\n")


def write(*args, end="\n"):
    for x in args[:-1]:
        sys.stdout.write(str(x) + " ")
    sys.stdout.write(str(args[-1]))
    sys.stdout.write(end)


def r_array():
    return [int(x) for x in input().split()]


def r_int():
    return int(eval(input()))


if __name__ == "__main__":
    main()


# Optimized solution

import os
import sys
from io import BytesIO, IOBase


def main():
    n = int(eval(input()))
    arr = list(map(int, input().split()))
    arr.sort()
    ans = 0
    k=max(arr)
    d = [0]*(k+1)
    if arr[0] == 1:
        if n>1 and arr[1]==1:
            print((0))
            quit()
        else:
            print((1))
            quit()
    for i in range(n):
        d[arr[i]]+=1
    for i in range(n):
        x=arr[i]
        if d[x]==1:
            ans+=1
        for j in range(x,k+1,x):
            d[j]+=1
    print(ans)


# fast-io region

BUFSIZE = 8192


class FastIO(IOBase):
    newlines = 0

    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None

    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()

    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()

    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)


class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")


sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)


def input():
    return sys.stdin.readline().rstrip("\r\n")


def write(*args, end="\n"):
    for x in args[:-1]:
        sys.stdout.write(str(x) + " ")
    sys.stdout.write(str(args[-1]))
    sys.stdout.write(end)


def r_array():
    return [int(x) for x in input().split()]


def r_int():
    return int(eval(input()))


if __name__ == "__main__":
    main()