- In
number theory, a
semiperfect number or
pseudoperfect number is a
natural number n that is
equal to the sum of all or some of its
proper divisors. A...
- In mathematics, and
particularly in
number theory, N is a
primary pseudoperfect number if it
satisfies the
Egyptian fraction equation 1 N + ∑ p | N 1...
- It is the
first primitive pseudoperfect number, and all
integers n {\displaystyle n} that are
multiples of 6 are
pseudoperfect (all
multiples of a perfect...
-
water at sea
level List of
highways numbered 80 "Sloane's A005835 :
Pseudoperfect (or semiperfect) numbers". The On-Line
Encyclopedia of
Integer Sequences...
- an open
meandric number. 2 {\displaystyle 2} is the
smallest primary pseudoperfect number, and it is the
first number to
return zero for the
Mertens function...
- 366 = 612 2,179,768,320 =
Leyland number 2,214,502,422 = 6th
primary pseudoperfect number. 2,219,006,624 = 745 2,222,222,222 =
repdigit 2,276,423,485 =...
- Ace number.
Numeral system Sloane, N. J. A. (ed.). "Sequence A005835 (
Pseudoperfect (or semiperfect) numbers)". The On-Line
Encyclopedia of
Integer Sequences...
- 2021
album by
Adele List of
highways numbered 30 "Sloane's A005835 :
Pseudoperfect (or semiperfect) numbers". The On-Line
Encyclopedia of
Integer Sequences...
- Zbl 1151.11300. Benkoski, Stan; Erdős, Paul (April 1974). "On
Weird and
Pseudoperfect Numbers".
Mathematics of Com****tion. 28 (126): 617–623. doi:10.2307/2005938...
- of
highways numbered 84 Sloane, N. J. A. (ed.). "Sequence A005835 (
Pseudoperfect (or semiperfect)
numbers n: some
subset of the
proper divisors of n...
