Let n be a non-negative integer. Then the number of divisors of the form 4 n + 1 of the number 10 10 ·…

Let n be a non-negative integer. Then the number of divisors of the form 4n+1 of the number 1010·1111·1313 is equal to _____.

Solution

Let N=210×510×1111×1313

Now, power of 2 must be zero,

Power of 5 can be anything,

Power of 13 can be anything.

But, power of 11 should be even.

So, required number of divisors is

1×11×14×6=924.

Asked in: JEE Main 2021 (27 Jul Shift 2)

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