Read More
Date: 19-12-2020
732
Date: 21-10-2019
724
Date: 29-12-2019
1180
|
A superior highly composite number is a positive integer for which there is an such that
for all , where the function counts the divisors of (Ramanujan 1962, pp. 87 and 115). It can be shown that all superior highly composite numbers are highly composite and that the th superior highly composite number has the form , where the factors are prime.
The first few superior highly composite numbers are 2, 6, 12, 60, 120, 360, 2520, 5040, 55440, ... (OEIS A002201), and the corresponding sequence of primes is 2, 3, 2, 5, 2, 3, 7, 2, 11, 13, 2, 3, 5, 17, 19, 2, 23, 7, 29, 3, 31, 2, 37, 41, 43, ... (OEIS A000705).
REFERENCES:
Ramanujan, S. "Highly Composite Numbers." Proc. London Math. Soc. 14, 347-407, 1915. Reprinted in Collected Papers (Ed. G. H. Hardy et al. ). New York: Chelsea, pp. 78-129, 1962.
Sloane, N. J. A. Sequences A000705/M0423 and A002201/M1591 in "The On-Line Encyclopedia of Integer Sequences."
|
|
دراسة تحدد أفضل 4 وجبات صحية.. وأخطرها
|
|
|
|
|
استمرار توافد مختلف الشخصيات والوفود لتهنئة الأمين العام للعتبة العباسية بمناسبة إعادة تعيينه
|
|
|