proper divisor造句
例句與造句
- An integer n > 1 whose only proper divisor is 1 is called a prime number.
- A semiperfect number that is equal to the sum of all its proper divisors is a perfect number.
- Its proper divisors are 1, 2, 3, 4 and 6 for a total of 16.
- A semiperfect number is a natural number that is equal to the sum of all or some of its proper divisors.
- However, there is no integer which has 120 as the sum of its proper divisors, making 120 an untouchable number.
- It's difficult to find proper divisor in a sentence. 用proper divisor造句挺難的
- No perfect number is untouchable, since, at the very least, it can be expressed as the sum of its own proper divisors.
- For example, the number 4 is not untouchable as it is equal to the sum of the proper divisors of 9 : 1 + 3 = 4.
- Since six equals the sum of its proper divisors, six is the smallest perfect number, Granville number, and \ mathcal { S }-perfect number.
- Since there is a subset of 12's proper divisors that add up to 12 ( all of them but with 4 excluded ), 12 is a semiperfect number.
- Sociable numbers are the numbers in cyclic lists of numbers ( with a length greater than 2 ) where each number is the sum of the proper divisors of the preceding number.
- Its proper divisors are 1, 2, 5, 7, 10, 14, and 35; these sum to 74, but no subset of these sums to 70.
- A closely related problem concerns sets of integers in which each integer in the set is a divisor, but not necessarily a proper divisor, of one plus the product of the other integers in the set.
- In number theory, an "'abundant number "'or "'excessive number "'is a number for which the sum of its proper divisors is greater than the number itself.
- A related concept is that of a perfect number, which is a number that equals the sum of " its own " proper divisors, in other words a number which forms an aliquot sequence of period 1.
- If the period of the sequence is 1, the number is a sociable number of order 1, or a perfect number for example, the proper divisors of 6 are 1, 2, and 3, whose sum is again 6.
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