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:...

twentieth abundant and highly abundant number (with 20 the first primitive abundant number and 70 the second). 90 is the third unitary perfect number (after...

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

semiperfect number. Eighteen is the first inverted square-prime of the form p·q2. In base ten, it is a Harshad number. It is an abundant number, as the sum...

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...

whereas an abundant number has a sum of its proper divisors that is larger than the number itself. Primitive abundant numbers are abundant numbers whose...

the prime 7-aliquot tree. It is the smallest primitive abundant number, and the first number to have an abundance of 2, followed by 104. 20 is the length...

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

composite number; colossally abundant number; the smallest number divisible by all the numbers 1 through 16 725,760 = highly totient number 726,180 =...

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

4), whose digits in decimal are also successive. It is the smallest abundant number, since it is the smallest integer for which the sum of its proper divisors...

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

composite number. Because it is the sum of its unitary divisors (excluding itself), it is a unitary perfect number, and it is an abundant number with an...

eight) is the natural number following 107 and preceding 109. 108 is: an abundant number. a semiperfect number. a tetranacci number. the hyperfactorial...

colossally abundant number, superior highly composite number 1,441,889 = Markov number 1,500,625 = 12252 = 354 1,539,720 = harmonic divisor number 1,563,372...

fourth pentagonal pyramidal number. Forty is a repdigit in ternary, and a Harshad number in decimal. 40 is an abundant number, because the sum of its proper...

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...

number 225,331,713 = self-descriptive number in base 9 229,345,007 = 475 232,792,560 = superior highly composite number; colossally abundant number;...

(forty-two) is the natural number that follows 41 and precedes 43. Forty-two (42) is the sixth pronic number and the eighth abundant number, with an abundance...

chiliagonal number 55296 = 3-smooth number 55440 = superior highly composite number; colossally abundant number 55459 = one of five remaining Seventeen...

[and] forty) is the natural number following 139 and preceding 141. 140 is an abundant number and a harmonic divisor number. It is the sum of the squares...

{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...

54 (fifty-four) is the natural number following 53 and preceding 55. 54 is an abundant number and a semiperfect number, like all other multiples of 6...

is a Harshad number and an abundant number. 150 degrees is the measure of the internal angle of a regular dodecagon. The last numbered Psalm in the Bible...

and square-free abundant number. 15120 = highly composite number; smallest number with exactly 80 factors. 15180 = tetrahedral number. 15376 = 1242, pentagonal...

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

number following 77 and preceding 79. 78 is: the 4th discrete tri-prime; or also termed Sphenic number, and the 4th of the form (2.3.r). an abundant number...