Search results
Results From The WOW.Com Content Network
A number n that has more divisors than any x < n is a highly composite number (though the first two such numbers are 1 and 2). Composite numbers have also been called "rectangular numbers", but that name can also refer to the pronic numbers, numbers that are the product of two consecutive integers. Yet another way to classify composite numbers ...
6 is the second smallest composite number. [1] It is also the first number that is the sum of its proper divisors, making it the smallest perfect number. [2] 6 is the first unitary perfect number, since it is the sum of its positive proper unitary divisors, without including itself. Only five such numbers are known to exist.
25011 = the smallest composite number, ending in 1, 3, 7, or 9, that in base 10 remains composite after any insertion of a digit; 25085 = Zeisel number [18] 25117 = cuban prime [14] 25200 = 224th triangular number, 24th highly composite number, [21] smallest number with exactly 90 factors [3] 25205 = largest number whose factorial is less than ...
It means that 1, 4, and 36 are the only square highly composite numbers. Saying that the sequence of exponents is non-increasing is equivalent to saying that a highly composite number is a product of primorials or, alternatively, the smallest number for its prime signature.
Twenty is a composite number. It is also the smallest primitive abundant number. [3] The Happy Family of sporadic groups is made up of twenty finite simple groups that are all subquotients of the friendly giant, the largest of twenty-six sporadic groups.
Kurtz et al. found no overlap between the odd pseudoprimes for the two sequences below 50∙10 9 and supposed that 2,277,740,968,903 = 1067179 ∙ 2134357 is the smallest composite number to pass both tests. [24]
The 10th highly composite, [3] the 5th superior highly composite, [4] superabundant, [5] and the 5th colossally abundant number. [6] It is also a sparsely totient number . [ 7 ] 120 is also the smallest highly composite number with no adjacent prime number, being adjacent to 119 = 7 ⋅ 17 {\displaystyle 119=7\cdot 17} and 121 = 11 2 ...
35 is the highest number one can count to on one's fingers using senary. 35 is the number of quasigroups of order 4. 35 is the smallest composite number of the form 6 k + 5 {\displaystyle 6k+5} , where k is a non-negative integer.