259
出典: フリー百科事典『ウィキペディア（Wikipedia）』 (2023/03/06 16:01 UTC 版)
259（二百五十九、二五九、にひゃくごじゅうきゅう）は、自然数または整数において、258の次で260の前の数である。
- ^ The composite numbers: numbers n of the form x*y for x > 1 and y > 1. Table of n, a(n) for n = 1..17737
- ^ Semiprimes (or biprimes): products of two primes. Table of n, prime(n) for n = 1..10000
- ^ d(n) a(n) = sigma(n), the sum of the divisors of n. Also called sigma_1(n). Table of n, a(n) for n = 1..100000
- ^ Deficient numbers: numbers k such that sigma(k) < 2k. Table of n, prime(n) for n = 1..10000
- ^ Numbers that are the sum of 3 nonzero squares in exactly 2 ways. Table of n, a(n) for n = 1...418
- ^ Numbers that are the sum of 4 positive cubes in 1 or more way. Table of n, a(n) for n = 1...10000
[続きの解説]
「259」の例文・使い方・用例・文例
- 259のページへのリンク
