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什么是完美数?
What is the perfect number?什么是完美数？?
What Is Perfect Number?就是第一个完美数。
Is the first perfect number.就是第一个完美数。
Six is 1st perfect number.就是第一个完美数。
This makes 6 the first perfect number.他们将它称为完美数。
It's called the perfect number.他们将它称为完美数。
This is called a perfect number.他们将它称为完美数。
Are called perfect numbers.他们将它称为完美数。
Such 他们将它称为完美数。
This one is called the perfect numbers.他们将它称为完美数。
Such 判断一个数是否是完美数。
Determine whether the given 判断一个数是否是完美数。
I need to determine if a number is perfect.而「完美数」，或许你已经知道，即符合σ(n)=2n的数字n。
A perfect number, as you probably know, is 经过了漫长的岁月，迄今为止，人类仅发现了49个完美数。
Even with all our supercomputers, we have only been able to find 49 perfect numbers so far.因为6和28是第一和第二个完美数，所以6/28也是一个完美的日子。
Since 6 and 28 are the first two perfect numbers, 6/28 is actually a 一个数如果恰好等于它的因子之和，这个数就称为“完美数”。
When a 因为6和28是第一和第二个完美数，所以6/28也是一个完美的日子。
June 28 can be expressed as 6/28 and 6 and 28 are the first two perfect numbers.下一个完美数是28，因为如果我们把它的所有因子加起来，我们得到1+2+4+7+14=28。
The next perfect number is 28, because if we add up all its factors we get 1+2+4+7+14=28.
