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# Why is 24 a perfect number?

## Why is 24 a perfect number?

The only even perfect number of the form x3 + 1 is 24. 24 is also the only even perfect number that is a sum of two positive cubes of integers. The number of divisors of a perfect number (whether even or odd) must be even, because N cannot be a perfect square.

## How do you tell if a number is abundant deficient or perfect?

Abundant: The sum of the proper factors is greater than the number itself. Deficient: The sum of the proper factors is less than the number itself. Perfect: The sum of the proper factors is equal to than the number itself. 1.

Is 28 deficient perfect or abundant?

Numbers whose sum of proper factors equals the number itself (such as 6 and 28) are called perfect numbers, while numbers whose sum of proper factors is less than the number itself are called deficient numbers.

### Is 23 abundant deficient or perfect?

Deficient numbers occur more frequently than abundant numbers. In other words, the sum of the proper divisors of most numbers is less than the numbers themselves. Examples of deficient numbers include 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 21, 22, and 23.

### Is 24 a perfect square?

Perfect Square. A perfect square is a number, from a given number system, that can be expressed as the square of a number from the same number system. 24 is NOT a perfect square. 24 is a natural number, but since there is no other natural number that can be squared to result in the number 24, 24 is NOT a perfect square …

Is 24 a perfect cube?

Is 24 a Perfect Cube? The number 24 on prime factorization gives 2 × 2 × 2 × 3. Here, the prime factor 3 is not in the power of 3. Therefore the cube root of 24 is irrational, hence 24 is not a perfect cube.

## Is 945 a deficient number?

945 is the smallest odd-abundant number. 945 = 33*5*7, so the sum of all divisors of 945 (including itself) is (1+3+32+33)*(1+5)*(1+7) = 40*6*8 = 1,920, while 945*2=1,890<1,920. Therefore, 945 is an abundant number.

## What is deficient number in math?

In number theory, a deficient number or defective number is a number n for which the sum of divisors of n is less than 2n. For example, the proper divisors of 8 are 1, 2, and 4, and their sum is less than 8, so 8 is deficient.

Is 48 abundant deficient or perfect?

So …. 48 is called an abundant number because it is less than the sum of its factors (without itself). (48 is less than 76.)

### What is abundant and deficient number?

We’ll write P(n) for the sum of all the proper divisors of the number n. If P(n) > n, then n is called an abundant number. If P(n) < n, then n is called a deficient number. If P(n) = n, then n is called a perfect number.

### What are factors of 24?

Factors of 24

• Factors of 24: 1, 2, 3, 4, 6, 8, 12 and 24.
• Negative Factors of 24: -1, -2, -3, -4, -6, -8, -12 and -24.
• Prime Factors of 24: 2, 3.
• Prime Factorization of 24: 2 × 2 × 2 × 3 = 23 × 3.
• Sum of Factors of 24: 60.

Why 24 is not a perfect square?

24 is NOT a perfect square. 24 is a natural number, but since there is no other natural number that can be squared to result in the number 24, 24 is NOT a perfect square.

## When do you call a number abundant or deficient?

As an extension of the idea of perfect numbers, the concept of “abundant” and “deficient” numbers emerged. If the sum of the proper divisors of a number is greater than the number itself, then the number is called abundant or excessive.

## Which is an abundant number 24 or 24?

For example, the proper divisors of 24 are 1, 2, 3, 4, 6, 8, and 12, whose sum is 36. Because 36 is greater than 24, the number 24 is abundant. Its abundance is 36 − 24 = 12.

Is there an infinite number of abundant numbers?

Every multiple of an abundant number is itself abundant, so there is an infinite number of abundant numbers. In 1998, the mathematician Marc Deleglise showed that roughly one-quarter of all the positive integers are abundant. Deficient numbers occur more frequently than abundant numbers.

### Why are numbers called deficient, perfect, and amicable?

“Abundant” is a strange way to describe a number, and equally strange are descriptions such as “deficient,” “perfect,” and “amicable.” But these descriptions of numbers came about because the ancient Greek mathematicians were intrigued by certain characteristics of positive integers .