C++ Beginner Questions

So i have 2 questions that need to be answered and i'm still currently stuck.

1. Given integer N, decide if it is possible to represent it as a sum of two squares of integers.

Definition
Method: IsSumOf2Squares
Parameter: unsigned int
Returns: bool
Method Signature: boolIsSumOf2Squares(unsignedintN)

Examples
1. 10
Returns True
10 = 1^2 + 3^2

2. 2
Returns True
2 = 1^2 + 1^2

3. 16
Returns True
16 = 0^2 + 4^2


2. You are given an integer N. Find the digits in this number that exactly divide N (division that leaves
0 as remainder) and display their count. For N=24, there are 2 digits (2 & 4). Both of these digits
exactly divide 24. So our answer is 2.

Note: If the same number is repeated twice at different positions, it should be counted twice,
e.g., For N=122, 2 divides 122 exactly and occurs at ones' and tens' position. So for this
case, our answer is 3. Division by 0 is undefined and will not be counted.

Definition
Method: DivideExactly
Parameter: unsigned int
Returns: unsigned int
Method Signature: unsigned intDivideExactly(unsignedintN)

Examples
1. 24
Returns 2
2 and 4 divides 24 equally.

2. 122
Returns 3
1 and 2 divides 122 equally.

3. 1024
Returns 3
1, 2 and 4 divides 1024 equally, 0 is not counted.

4. 345
Returns 2
3 and 5 divides 345 equally.

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ANY help is appreciated and need this ASAP