Prime factorization is the process of expressing a number as the product of its Given an integer n, return true if n is a perfect number, otherwise return false. A factor of an integer n is defined as an integer i where n % i == 0. Smallest Value After Replacing With Sum of Prime Factors - You are given a positive integer n. Example 1: Input: num = 28 Output: true Explanation: 28 = 1 + 2 + 4 + 7 + . Explanation: Given a number n, find all prime factors of n. Intuitions, example walk through, and complexity analysis. Can you solve this real interview question? Find Numbers with Even Number of Digits - Given an array nums of integers, return how many of them I'm trying to solve the HackerRank "Find the Factor" problem in JavaScript, but I keep hitting the 10-second time limit. Description Given two positive integers a and b, return the number of common factors of a and b. An integer x is a common Contribute to Sandeep-lohoni/LeetCode-Journey development by creating an account on GitHub. Number of Common Factors - Given two positive integers a and b, return the number of common factors of a and b. Consider a list of all factors of n sorted in ascending order, return the kth factor in In-depth solution and explanation for LeetCode 2427. Examples: Explanation: 1, 2, 5 and 10 are the divisors of 10. Note : Prime number is a natural number greater than 1 that has exactly two factors:1 and itself. The problem gives us positive integers n Declare a vector spf of size MAXN + 1, initialized with 1, to store the smallest prime factor (SPF) of every number up to MAXN. LeetCode Solutions in C++23, Java, Python, MySQL, and TypeScript. An integer x is a common factor of The prime factorization of a number can be useful in solving mathematical problems such as finding the greatest common divisor (GCD) of two Given a positive integer n, find all the distinct divisors of n. The GCD is then obtained by multiplying all the common factors Can you solve this real interview question? Closest Divisors - Given an integer num, find the closest two integers in absolute difference whose product equals num + 1 or num + 2. Can you solve this real interview question? Ugly Number - An ugly number is a positive integer which does not have a prime factor other than 2, 3, and The GCD (Greatest Common Divisor), also known as the HCF (Highest Common Factor), is the largest positive integer that divides two or more numbers without leaving a Last update: May 29, 2025 Original Integer factorization In this article we list several algorithms for the factorization of integers, each of which can be Can you solve this real interview question? Number of Common Factors - Given two positive integers a and b, return the number of common factors of a and b. Otherwise, return The best approach is to find the prime factorization of the number, then use that to construct the answer. An integer x is a common factor of a and b if x divides both a and b. Given a positive integer n, find its prime factorization. 🏆 Curated solutions to Leetcode problems in multiple languages to ace the Coding Interviews. Use two lists: one to collect smaller factors (i) and one for their corresponding larger partners (n/i). Examples: Input: n = 18 Output: Can you solve this real interview question? Distinct Prime Factors of Product of Array - Given an array of positive integers nums, return the number of distinct prime factors in the product of the Can you solve this real interview question? Super Ugly Number - A super ugly number is a positive integer whose prime factors are in the array Can you solve this real interview question? Three Divisors - Given an integer n, return true if n has exactly three positive divisors. A factor of an integer n is defined as an integer i where n % i == 0. Consider a list of all factors of n sorted in ascending order, return the kth factor in this list or return -1 if n has less than k factors. offers a set of strategies if you want a state of the art solution. Number of Common Factors in Python, Java, C++ and more. Continuously replace n with the sum of its prime factors. Factors of n come in pairs (i and n/i), which allows iterating only up to sqrt (n) for efficiency. Return K-th Smallest Prime Fraction - You are given a sorted integer array arr containing 1 and prime numbers, where all the integers of arr are unique. Better than Find the kth factor of a given integer n in ascending order, considering optimal solutions for performance. * Note that if a prime factor divides n Prime Factorization: This approach involves finding the prime factors of the two numbers and then finding the common factors.
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