In number theory, an abundant number or excessive number is a positive integer for which the sum of its proper divisors is greater than the number. The...

In number theory, a colossally abundant number (sometimes abbreviated as CA) is a natural number that, in a particular, rigorous sense, has many divisors...

In number theory, a highly abundant number is a natural number with the property that the sum of its divisors (including itself) is greater than the sum...

primitive abundant number is an abundant number whose proper divisors are all deficient numbers. For example, 20 is a primitive abundant number because:...

natural number that follows 41 and precedes 43. 42 is a pronic number, an abundant number as well as a highly abundant number, a practical number, an admirable...

primitive abundant number; smallest odd primitive semiperfect number; Leyland number 946 = 2 × 11 × 43, sphenic number, 43rd triangular number, hexagonal...

score. Twenty is a composite number. It is also the smallest primitive abundant number. The Happy Family of sporadic groups is made up of twenty finite simple...

the natural number following 11 and preceding 13. Twelve is the 3rd superior highly composite number, the 3rd colossally abundant number, the 5th highly...

the first superior highly composite number, and the first colossally abundant number. An integer is determined to be even if it is divisible by two. When...

the natural number following 599 and preceding 601. Six hundred is a composite number, an abundant number, a pronic number, a Harshad number and a largely...

also the twentieth abundant and highly abundant number (with 20 the first primitive abundant number and 70 the second). The number of divisors of 90 is...

number (7 × 11 × 13), pentagonal number, pentatope number, palindromic number 1002 = sphenic number, Mertens function zero, abundant number, number of...

highly composite number, the 4th colossally abundant number, the 9th highly composite number, a unitary perfect number, and an abundant number. It is the smallest...

system. It is also an abundant number, since the sum of its proper divisors (66) is greater than itself. 54 is an abundant number because the sum of its...

number, the 19th highly composite number, an abundant number, the 8th colossally abundant number and the number of permutations of 4 items out of 10 choices...

smallest weird number, a natural number that is abundant but not semiperfect, where it is also the second-smallest primitive abundant number, after 20. 70...

natural number following 199 and preceding 201. 200 is an abundant number, as 265, the sum of its proper divisors, is greater than itself. The number appears...

– odd abundant number 2207 – safe prime, Lucas prime 2208 – Keith number 2209 = 472, palindromic in base 14 (B3B14), centered octagonal number 2211 –...

is the natural number following 17 and preceding 19. It is an even composite number. 18 is a semiperfect number and an abundant number. It is a largely...

pentagonal pyramidal number. a primitive abundant number. a nontotient. a repdigit in bases 24 (MM24), 49 (BB49), and 54 (AA54). a Harshad number. the SMTP status...

498 = 2 × 3 × 83, sphenic number, untouchable number, admirable number, abundant number A prime number, isolated prime, Chen prime, 4499 - 3499 is prime...

number. the largest number in English not containing the letter 'n' in its name, when using short scale. 88 and 945 are the smallest coprime abundant...

composite number, the 2nd colossally abundant number, the 3rd triangular number, the 4th highly composite number, a pronic number, a congruent number, a harmonic...

following 233 and preceding 235. Additionally: 234 is a practical number and an abundant number. There are 234 ways of grouping six children into rings of at...

{4^{23}}{3^{23}}}\right\rfloor } , palindromic number. 748 = 22 × 11 × 17, nontotient, happy number, primitive abundant number 749 = 7 × 107, sum of three consecutive...

semiperfect number is 945. A semiperfect number is necessarily either perfect or abundant. An abundant number that is not semiperfect is called a weird number. With...

10th superior highly composite number; 10th colossally abundant number; 38th highly composite number, smallest number divisible by the numbers from 1...

15th colossally abundant number, 15th superior highly composite number, and the largest number to be both. 7,007,009,909 = smallest number in base 10 to...

divisor number 1,441,440 = 11th colossally abundant number, 11th superior highly composite number, 40th highly composite number 1,441,889 = Markov number 1...

A047802 in the OEIS) It is also the largest prime factor of the smallest abundant number not divisible by the first even (of only one) and odd primes, 5391411025...