n = int(input('请输入一个任意正整数：'))
print('%d=' % n, end='')
while n > 1:
    for i in range(2, int(n ** 0.5 + 1)):
        if n % i == 0:
            n = int(n / i)
            print('%d*' % i, end='')
            break
    else:
        print(n)
        break