Deficient number
Deficient number In mathematics, a deficient number or defective number is a number n for which ...
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A defective number   (translated from French)
A defective number In mathematic , one a defective number is an entirety N such as number A pleasant number. A friendly number Nombre perfect An almost perfect number ...
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Number   (translated from Portuguese)
Number Number it is an object of Matemática used to describe measured amount or. The number concept probably was one of the first ... rational numbers, in turn, they include whole number fractions. números Reals is all rational numbers ... more números irrationals . Definitions The concept of number in its simpler form is clearly ...
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Perfect number
Perfect number In mathematics, a perfect number is defined as an integer which is ... itself. Six (6) is the first perfect number, because 1, 2 and 3 are its ... 1 + 2 + 3 = 6. The next perfect number is 28 = 1 + 2 + 4 + 7 + 14 ... 2 n − 1 is a prime number in each instance, Euclid proved that ...
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Abundant number
Abundant number In mathematics, an abundant number or excessive number is a number n for which σ(n) > 2n. Here ... is that the proper divisors of the number (the divisors except the number itself) ...
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363 (number)
363 (number) List of numbers — Integers << 0 100 ... of the year. 363 is a palindromic number in bases 3, 10 11 and 32 ... base 32. 363 is a 122-gonal number. 363 is a deficient number. The Mertens function returns 0 363 ...
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Thabit number
Thabit number A Thabit number is an integer of the form and the deficient member of the pair is given by ... for example, n = 2 gives the Thabit number 11, and n = 1 gives the ...
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Superabundant number
Superabundant number In mathematics, a superabundant number (sometimes abbreviated as SA) is a certain kind of natural number. Formally, a natural number n is called superabundant iff for any ... are Harshad numbers. See also Colossally abundant number Highly abundant number Abundant number Deficient ...
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8128 (number)
8128 (number) List of numbers — Integers << 1k 2k ... 4854 Hexadecimal 1FC0 8128 is the natural number following 8127 and preceding 8129 . It is most notable for being a perfect number, and one of the earliest numbers to ... be recognized as such. As a perfect number, it is tied to the Mersenne prime ... Also related to its being a perfect number, 8,128 is a harmonic divisor ...
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Hyperperfect number
Hyperperfect number In mathematics, a k-hyperperfect number (sometimes just called hyperperfect number) is a natural number n for which the equality n = 1 ... of all positive divisors of n). A number is perfect iff it is 1- ...
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