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Subjects>Math>Math & Arithmetic

What are the perfect numbers between 1 and 20?

Updated: 12/11/2022

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Is there any perfect numbers that are in between 1 and 30?

No, there are no known perfect numbers between 1 and 30. The only perfect numbers that have been discovered are 6, 28, 496, and 8128.

What are the square numbers between 1 and 20?

The square numbers between 1 and 20 are 1,4,9 and 16.

Which whole numbers have square roots between 1 and 20?

All whole numbers between 1 and 400 (=20 square).

What are the numbers arranged from 1 to 20 in a circle such that the sum of any two adjacent numbers is a perfect square?

hnmhv

What is the relationship between Mersenne prime and perfect numbers?

Perfect numbers have the form 2n-1(2n-1) where 2n-1 is a Mersenne prime. When a new Mersenne prime is discovered, so is a new perfect number.

Related questions

How many perfect square numbers between 1 to 1000 are?

There are 31 perfect square numbers between 1 and 1000 (including 1).

What are the perfect numbers between 1 and 30?

The two perfect numbers between 1 and 30 are: 6, 28

Is there any perfect numbers that are in between 1 and 30?

No, there are no known perfect numbers between 1 and 30. The only perfect numbers that have been discovered are 6, 28, 496, and 8128.

How many numbers between 10 and 20 are perfect squares?

Only one - 16

What are the square numbers between 1 and 20?

The square numbers between 1 and 20 are 1,4,9 and 16.

Is 20 a square number or not?

No. Square numbers (or perfect square numbers) are squares of integers. The perfect square numbers are 1, 4, 9, 16, 25, 36 ... 20 is not in the series.

Which whole numbers have square roots between 1 and 20?

All whole numbers between 1 and 400 (=20 square).

What are all the perfect numbers between 1 and 100?

6 and 28

What are the numbers between 1 and 9 that forms a perfect square?

4

What are the numbers arranged from 1 to 20 in a circle such that the sum of any two adjacent numbers is a perfect square?

hnmhv

What is the relationship between Mersenne prime and perfect numbers?

Perfect numbers have the form 2n-1(2n-1) where 2n-1 is a Mersenne prime. When a new Mersenne prime is discovered, so is a new perfect number.

How many 9 digit combinations are there from 1 to 20-?

There are 167960 9 digits combinations between numbers 1 and 20.

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