Answer:
True.
Explanation:
If a function is multiplicative then it hold following properties
1.f(1)=1
2.
hold for all a and b when even a and b are not co-prime.
Let
is a function of sum of divisor of n
=Sum of divisor of n
If n=1 then

It is satisfied first property.
Suppose n=9
Then divisor of 9=1,3,9
Sum of divisor=1+3+9=13
Divisor of 3=1,3
Sum of divisors of 3=1+3=4


Hence,
Therefore,
is not a multiplicative function.
Hence, given statement is true.