# How do you find the abundant number?

## How do you find the abundant number?

Abundant numbers are numbers that are made up of more than they’re worth. You can find an abundant number by adding up the proper factors of a number to see if they add up to more than the number itself. The abundance of a number is the difference between the sum of the proper factors and the number.

### Is there a pattern to abundant numbers?

The first 28 abundant numbers are: 12, 18, 20, 24, 30, 36, 40, 42, 48, 54, 56, 60, 66, 70, 72, 78, 80, 84, 88, 90, 96, 100, 102, 104, 108, 112, 114, 120, (sequence A005101 in the OEIS). Because 36 is greater than 24, the number 24 is abundant.

What is the most abundant number?

A number which is abundant but for which all its proper divisors are deficient is called a primitive abundant number (Guy 1994, p. 46). The first few abundant numbers are 12, 18, 20, 24, 30, 36, (OEIS A005101).

Why is 1000 called an abundant number?

A number n is said to be Abundant Number if sum of all the proper divisors of the number denoted by sum(n) is greater than the value of the number n. And the difference between these two values is called the abundance.

## What are the first 10 abundant numbers?

The first 10 abundant numbers are: 12, 18, 20, 24, 30, 36, 40, 42, 48, 54,…

### Is 945 an abundant 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 number means abundance?

So when you see the number 888, take it as a reminder that abundance means a lot more than money. Take it as a sign that you’re at the point where you can unleash an abundance of positive energy towards the important people in your life.

Is 496 a abundant number?

There are infinitely many abundant numbers, both even (e.g., every multiple of 12) and odd (e.g., every odd multiple of 945)….abundant number.

the sum is and we say n is a example
equal to 2n perfect number 6, 28, 496
greater than 2n abundant number 12, 18, 20, 24, 30

## Is 12 abundant deficient or perfect?

The proper divisors of 12 are 1, 2, 3, 4, and 6. Because the sum of its proper divisors (1 + 2 + 3 + 4 + 6 = 16) is greater than 12, 12 is an abundant number. Numbers like 8, whose proper divisors have a sum that is less than the number itself, are called deficient or defective.

### Is 32 abundant deficient or perfect?

32 is not an abundant number. Its proper divisors are 1, 2, 4, 8 and 16 and their sum is 31, which is less than 32. Therefore, 32 is the least sum of two distinct abundant numbers that is not an abundant number.

Are there infinitely many abundant numbers?

There are infinitely many abundant numbers. Every positive multiple of an abundant number is an abundant number. Every multiple of a perfect number greater than itself is an abundant number.

Is 10 an abundant number?

Examples. The first 10 abundant numbers are: 12, 18, 20, 24, 30, 36, 40, 42, 48, 54,…

## What is the first abundant number?

It can be shown by trial and error that 12 is the first abundant number (i.e. there are no abundant numbers smaller than 12). The following is the list of the first 22 abundant numbers: 12, 18, 20, 24, 30, 36, 40, 42, 48, 54, 56, 60, 66, 70, 72, 78, 80, 84, 88, 90, 96, 100.

### Are all multiples of an abundant number also abundance?

Proof. Recall that all multiples of an abundant number are also abundant, and that all multiples of a perfect number save the perfect number itself are abundant (by Theorem AbT1 above and its corollary). Now consider an even number.

What are primitive abundant numbers A091191?

A091191 Primitive abundant numbers: abundant numbers (A005101) having no abundant proper divisor (abundant numbers all of whose proper divisors are either deficient numbers or perfect numbers). (Union of A071395 and A275082 .)

How do you prove that a number is abundant?

Properties. All positive multiples of abundant numbers are also abundant: Given a positive abundant number n and any positive integer m, the number m n is also abundant. Proof. It suffices to prove that n p is abundant where n is abundant and p is prime, because m is a product of zero or more primes and they can be applied by induction.