如何消除素数分解输出中显示的额外星号？

def prime_factorization(n):
    factors = []
    d = 2
    while d <= n:
        if (n % d) == 0:
            factors.append(d)
            n //= d
        else:
            d += 1
    return factors

def format_prime_factors(factors):
    formatted_factors = []
    for factor in factors:
        count = factors.count(factor)
        if count == 1:
            formatted_factors.append(str(factor))
        else:
            formatted_factors.append(f"{factor}^{count}")
    return formatted_factors

def print_prime_factors(n):
    factors = prime_factorization(n)
    formatted_factors = format_prime_factors(factors)
    result = " * ".join(formatted_factors)
    print(result)

# 调用示例
print_prime_factors(60)