Maximize Number of Nice Divisors - Problem
You are given a positive integer primeFactors. You need to construct a positive integer n that satisfies the following conditions:
- The number of prime factors of
n(not necessarily distinct) is at mostprimeFactors. - The number of nice divisors of
nis maximized.
Note: A divisor of n is nice if it is divisible by every prime factor of n. For example, if n = 12, then its prime factors are [2,2,3], so 6 and 12 are nice divisors, while 3 and 4 are not.
Return the number of nice divisors of n. Since the answer can be very large, return it modulo 109 + 7.
Input & Output
Example 1 — Basic Case
$
Input:
primeFactors = 5
›
Output:
6
💡 Note:
Optimal partition is [3,2] giving us nice divisors = 3 × 2 = 6. The number could be 2³×3² with nice divisors being multiples of 2×3=6.
Example 2 — All 3s
$
Input:
primeFactors = 8
›
Output:
18
💡 Note:
8 % 3 = 2, so we use [3,3,2] partition. Nice divisors = 3 × 3 × 2 = 18.
Example 3 — Small Input
$
Input:
primeFactors = 4
›
Output:
4
💡 Note:
For small inputs ≤ 4, the answer is the number itself. Partition [4] or [2,2] both give 4.
Constraints
- 1 ≤ primeFactors ≤ 109
Visualization
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Understanding the Visualization
1
Input
Given primeFactors = 5 (total count of prime factors)
2
Find Optimal Partition
Partition into groups that maximize product: [3,2]
3
Calculate Nice Divisors
Nice divisors = 3 × 2 = 6
Key Takeaway
🎯 Key Insight: Use mathematical optimization with mostly 3s to maximize the product of partition elements
💡
Explanation
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