输入两个整数A和B，求A的B次方的因子和，结果对1000000007取模。

def mod_exp(base, exp, mod):
    result = 1
    while exp > 0:
        if exp % 2 == 1:
            result = (result * base) % mod
        base = (base * base) % mod
        exp //= 2
    return result

def sum_of_factors(n):
    total = 0
    limit = int(n**0.5)
    for i in range(1, limit + 1):
        if n % i == 0:
            total += i
            if i != n // i:  # 如果是不同的因子，添加两个因子
                total += n // i
    return total

def main(A, B):
    MOD = 1000000007
    power_value = mod_exp(A, B, MOD)
    factors_sum = sum_of_factors(power_value) % MOD
    return factors_sum

# 示例
A = 2
B = 3
result = main(A, B)
print(result)