# Best answer: How do you check if a number is a perfect number in Java?

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Find the factors of the given number (n) by using a loop (for/ while). Calculate the sum of factors and store it in a variable s. Compare the sum (s) with the number (n): If both (s and n) are equal, then the given number is a perfect number.

## How do you know if a number is a perfect number?

A number is a perfect number if is equal to sum of its proper divisors, that is, sum of its positive divisors excluding the number itself.

## Is perfect method Java?

An integer number is said to be a perfect number if its factors, including 1 (but not the numbers itself), sum to the number. For example,6 is a perfect number, because 6=1+2+3. Write method Perfect that determines whether number is a perfect number.

## How would you write a program that checks whether a number is a perfect number?

Here is source code of the Python Program to check if a number is a Perfect number. The program output is also shown below. n = int(input(“Enter any number: “)) sum1 = 0 for i in range(1, n): if(n % i == 0): sum1 = sum1 + i if (sum1 == n): print(“The number is a Perfect number!

## What does strong number mean?

Strong number is a special number whose sum of the factorial of digits is equal to the original number. For Example: 145 is strong number.

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## What are the perfect numbers from 1 to 100?

There are only 2 perfect numbers from 1 to 100 which are 6 and 28. The latest perfect number was discovered in 2018 which has 49,724,095 digits.

## Is 28 a perfect number?

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

## What is magic number in Java?

What is Magic Number in Java? Magic number is the if the sum of its digits recursively are calculated till a single digit If the single digit is 1 then the number is a magic number. Magic number is very similar with Happy Number.

## How many perfect numbers are there?

As of 2019 there are 51 known perfect numbers in total.

## What is a perfect number in Java?

Any number can be a Java Perfect Number if the sum of its positive divisors excluding the number itself is equal to that number. For example, 28 is a perfect number because 28 is divisible by 1, 2, 4, 7, 14 and 28 and the sum of these values is 1 + 2 + 4 + 7 + 14 = 28. 