Sasha multiplied all the divisors of the natural number $n$. Fedya increased each divider by $1$, and then multiplied the results. If the product found Fedya is divided by the product found by Sasha , what can $n$ be equal to ?
1. **Identify the problem and initial conditions:**
   - We need to find the natural number \( n \) such that the product of all divisors of \( n \) (let's call this product \( P \)) divides the product of each divisor of \( n \) increased by 1 (let's call this product \( Q \)).
   - We start by noting that \( n = 1 \) works because the only divisor of 1 is 1 itself, and \( 1+1 = 2 \). Thus, \( Q = 2 \) and \( P = 1 \), and \( 2 \div 1 = 2 \), which is an integer.

2. **Consider the case when \( n > 1 \):**
   - Let the divisors of \( n \) be \( 1 = d_1 < d_2 < \dots < d_k = n \).
   - The product of all divisors of \( n \) is \( P = d_1 \cdot d_2 \cdot \dots \cdot d_k \).
   - The product of each divisor increased by 1 is \( Q = (d_1 + 1) \cdot (d_2 + 1) \cdot \dots \cdot (d_k + 1) \).

3. **Analyze the relationship between \( P \) and \( Q \):**
   - We need \( P \mid Q \), i.e., \( d_1 \cdot d_2 \cdot \dots \cdot d_k \mid (d_1 + 1) \cdot (d_2 + 1) \cdot \dots \cdot (d_k + 1) \).
   - Note that \( d_k + 1 = n + 1 \) is relatively prime with all divisors of \( n \) because \( n \) is the largest divisor and \( n + 1 \) is not divisible by any divisor of \( n \).

4. **Simplify the divisibility condition:**
   - We need \( d_2 \cdot d_3 \cdot \dots \cdot d_k \mid (d_1 + 1) \cdot (d_2 + 1) \cdot \dots \cdot (d_{k-1} + 1) \).
   - Since \( d_{i+1} \ge d_i + 1 \) for all \( i = 1, 2, \dots, k-1 \), we have \( d_2 \cdot d_3 \cdot \dots \cdot d_k \ge (d_1 + 1) \cdot (d_2 + 1) \cdot \dots \cdot (d_{k-1} + 1) \).

5. **Equality condition:**
   - For the equality \( d_2 \cdot d_3 \cdot \dots \cdot d_k = (d_1 + 1) \cdot (d_2 + 1) \cdot \dots \cdot (d_{k-1} + 1) \) to hold, we must have \( d_{i+1} = d_i + 1 \) for all \( i = 1, 2, \dots, k-1 \).
   - This implies \( d_k = d_{k-1} + 1 \), \( d_{k-1} = d_{k-2} + 1 \), and so on, until \( d_2 = d_1 + 1 \).

6. **Determine \( n \):**
   - Since \( d_1 = 1 \), we have \( d_2 = 2 \), \( d_3 = 3 \), and so on, up to \( d_k = n \).
   - Therefore, \( n = d_k = d_{k-1} + 1 \implies d_{k-1} = n - 1 \).
   - Since \( d_{k-1} \) is a divisor of \( n \), \( n - 1 \mid n \implies n - 1 \mid 1 \implies n = 2 \).

7. **Verify the solution:**
   - For \( n = 2 \), the divisors are \( 1 \) and \( 2 \).
   - \( P = 1 \cdot 2 = 2 \).
   - \( Q = (1 + 1) \cdot (2 + 1) = 2 \cdot 3 = 6 \).
   - \( Q \div P = 6 \div 2 = 3 \), which is an integer.

Thus, \( n \) can only be either \( 1 \) or \( 2 \).

The final answer is \( \boxed{ n = 1 } \) or \( n = 2 \).