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In mathematics, a multiply perfect number (also called multiperfect number or pluperfect number) is a generalization of a perfect number. For a given natural number k , a number n is called k -perfect (or k -fold perfect) if the sum of all positive divisors of n (the divisor function , σ ( n )) is equal to kn ; a number is thus perfect if and ...
So, 6 is a perfect number because the proper divisors of 6 are 1, 2, and 3, and 1 + 2 + 3 = 6. [2] [4] There is a one-to-one correspondence between the Mersenne primes and the even perfect numbers, but it is unknown whether there exist odd perfect numbers. This is due to the Euclid–Euler theorem, partially proved by Euclid and completed by ...
Notably, absent consensus, please do not add articles about individual perfect numbers themselves (such as 6). Pages in category "Perfect numbers" The following 11 pages are in this category, out of 11 total.
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The Moon revolves around the Earth the same direction as Earth spins but 27 (27.3) times slower. 27km is the circumference of the LHC located at CERN in Meyrin Switzerland; The atomic number of cobalt. Dark matter is thought to make up 27% of the universe. [12] 27 is the number of bones in the human hand. [13]
Candy canes are a peppermint treat long associated with Christmas. Learn their history, including why they were first made with red and white stripes.
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