Let n be a non-negative integer. Then the number of divisors of the form 4 n + 1 of the number 10 10 ·…
Solution
Let
Now, power of must be zero,
Power of can be anything,
Power of can be anything.
But, power of should be even.
So, required number of divisors is
Asked in: JEE Main 2021 (27 Jul Shift 2)