Best Answer Prime, 23 March 2013 - 08:51 PM

I am only aware of this general rule.

That is not to say there aren't any other possibilities for finding perfect numbers.

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Started by Utkrisht123, Mar 23 2013 06:05 AM

Best Answer Prime, 23 March 2013 - 08:51 PM

I am only aware of this general rule.

Spoiler for general formula

That is not to say there aren't any other possibilities for finding perfect numbers.

Go to the full post
7 replies to this topic

Posted 23 March 2013 - 06:05 AM

Perfect numbers are number whose sum of factors are twice the number itself.

Example

1. 6 factors of 6 are 1,2,3 and 6 sum=12 i.e 2 * 6

2. 28 factors 1,2,4,7,14,28 sum=56 i.e 2 * 28

can you tell any other perfect no?

Posted 23 March 2013 - 12:55 PM

Spoiler for odd

**Edited by TimeSpaceLightForce, 23 March 2013 - 12:55 PM.**

Posted 23 March 2013 - 03:40 PM

Spoiler for odd

1 has only 1 as a factor so sum is 1

Posted 23 March 2013 - 05:40 PM

Didn`t find one yet

**Edited by wolfgang, 23 March 2013 - 05:47 PM.**

Posted 23 March 2013 - 05:52 PM

Perfect numbers are number whose sum of factors are twice the number itself.

Example

1. 6 factors of 6 are 1,2,3 and 6 sum=12 i.e 2 * 6

2. 28 factors 1,2,4,7,14,28 sum=56 i.e 2 * 28

can you tell any other perfect no?

Spoiler for

Posted 23 March 2013 - 08:51 PM Best Answer

I am only aware of this general rule.

Spoiler for general formula

That is not to say there aren't any other possibilities for finding perfect numbers.

Past prime, actually.

Posted 24 March 2013 - 03:08 AM

COMBINATION: 4927

Spoiler for recursion

Posted 25 March 2013 - 01:13 AM

Perfect numbers are number whose sum of factors are twice the number itself.

Example

1. 6 factors of 6 are 1,2,3 and 6 sum=12 i.e 2 * 6

2. 28 factors 1,2,4,7,14,28 sum=56 i.e 2 * 28

can you tell any other perfect no?

Spoiler for

In old (Euclid) times, they did not count the number as its own divisor, but they did count 1. Thus, Perfect Number used to be equal to the sum of its divisors (Aliquot Parts.)

(Don't quote me on that.)

Past prime, actually.

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