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个人中心收藏查看我的收藏0有用+10263播报讨论上传视频自然数之一展开3个同名词条263是262与264之间的自然数，属于质数、奇数，也是快乐数（其各位平方和迭代计算最终结果为1），可表示为五个连续质数之和（43+47+53+59+61)。在数学领域，263被收录于OEIS快乐数数列（A007770） [7]，并被列为满足特定个位数条件的素数之一。应用方面，H.263是国际电信联盟发布的低码率视频编码标准，用于视频通信；NGC 263为天文学中位于鲸鱼座的星系；苏联曾设计代号263工程的坦克歼击车。历史记载中，263年是中国数学家刘徽完成《九章算术注》的年份，早于印度分数运算理论约400年 [8]。中文名二百六十三
别    名贰佰陆拾叁
罗马数字CCLXIII
二进制100000111
三进制100202
四进制10013
八进制407
十二进制19B
十六进制107
倒数循环节262位 [6]

目录
1在数学中▪数学性质▪倍数表▪次方表2在人类文化中3在科学中4在地理中5在天文中6在其他领域中
在数学中
播报编辑数学性质第56个素数。前一个为257，后一个为269。 [1]非正规质数。前一个为257，后一个为271。（OEIS中的数列A000928） [2]陈素数。263+2=265=5×53。前一个为257，后一个为269。（OEIS中的数列A109611） [3]满足3n-1的素数。前一个为257，后一个为269。（OEIS中的数列A003627） [4]安全质数。对应索菲热尔曼质数为131。前一个为227，后一个为347。（OEIS中的数列A005385） [5]全循环质数。的循环节为0038022813688212927756653992395437262357414448669201520912547528517110266159695817490494296577946768060836501901140684410646387832699619771863117870722433460076045627376425855513307984790874524714828897338403041825095057034220532319391634980988593155893536121673（共263-1=262位）。前一个为257，后一个为269。（OEIS中的数列A001913） [6]十进制的等数位数。快乐数。263→2²+6²+3²=49→4²+9²=97→9²+7²=130→1²+3²+0²=10→1²+0²=1。前一个为262，后一个为280。（OEIS中的数列A007770） [7]5个连续质数和（43+47+53+59+61）倍数表倍数表倍数乘积12632526378941,05251,31561,57871,84182,10492,367102,630112,893123,156133,419143,682153,945164,208174,471184,734194,997205,260215,523225,786236,049246,312256,575266,838277,101287,364297,627307,890318,153328,416......次方表次方表倍数乘积1263269,169318,191,44744,784,350,56151,258,284,197,5436330,928,743,953,809787,034,259,659,851,767822,890,010,290,541,014,72196,020,072,706,412,286,871,623101,583,279,121,786,431,447,236,849......
在人类文化中
播报编辑宜兰县壮围乡的邮递区号为263津巴布韦的国际电话区号为263大和级战舰是日本海军所建造战舰的舰型，全长263米九七式舰上攻击机为日本海军于1930年代后期开发的舰上攻击机，巡航速度为263km/h2008年10月3日，美国国会众议院以263票赞成171票反对投票通过经过修改的总额达7000亿美元的2008年经济稳定紧急法案维克斯VC.1维京的最大速度为263英里玉郎漫画出版至1992年9月19日第263期停刊
在科学中
播报编辑𬭳的原子量为263。1983年的美国针对三聚氰胺进行动物实验研究，49只雄鼠和50只雌鼠每天被喂食263毫克的三聚氰胺20周之后，约的雄鼠身上被验出有癌细胞，而经过103周相当于2年多以后，49只雄鼠全部都带有癌细胞
在地理中
播报编辑香港一共有263个岛屿亚历山大县 (北卡罗莱纳州)的面积为263平方英里伊塔斯加县的水域面积为263平方英里
在天文中
播报编辑NGC 263 是鲸鱼座的一个星系
在其他领域中
播报编辑公元263年（263年）公元前263年平年的第263天是9月20日闰年的第263天是9月19日H.263是由ITU-T制定的视频会议用的低码率视频编码标准，属于视频编解码器263也可表示为苏联坦克歼击车：263工程（或Obj.263）新手上路成长任务编辑入门编辑规则本人编辑我有疑问内容质疑在线客服官方贴吧意见反馈投诉建议举报不良信息未通过词条申诉投诉侵权信息封禁查询与解封©2025 Baidu 使用百度前必读 | 百科协议 | 隐私政策 | 百度百科合作平台 | 京ICP证030173号 京公网安备11000002000001号window.PAGE_DATA= 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263263合金是一种可时效硬化的Ni-Co-Cr-Mo合金，设计用于在退火状态下将极佳的时效强度特性与出色的制造特性相结合。 虽然其在高温下的强度不如Waspaloy或R-41高，但比这些合金更容易形成或焊接。 263合金表现出优异的中温拉伸延展性，并且通常不受γ相强化合金常见的应变时效开裂问题的影响。该合金是先进超超临界机组用候选材料，具有组织稳定性，是时效强化钴镍基变形高温合金，含有较高量的钴及多种强化元素，该合金在815～870℃有较高的抗拉强度和抗蠕变能力、良好的抗氧化性和耐腐蚀、在冷热反复交替作用下有较高的疲劳强度以及良好的成形性和焊接性。用于涡轮发动机涡轮盘、叶片、高温紧固件、卡箍、密封圈及弹性元件等。263合金是经过沉淀硬化，同时为了固溶强化又添加了钼的一种镍-铬-钴合金。263合金不但有高强度和耐腐蚀性，而且在焊接结构中还表现出好的成形性和高温延展性。  应用领域：合金在锻造时易产生内裂，允许重锤打击。钢锭装炉温度不高于700℃，低温区域先预热20-30分钟，***终加热温度1150℃-1180℃，开锻温度不低于1050℃，终锻温度不低于950℃。 2、该合金的晶粒度平均尺寸与锻件的变形程度、终锻温度密切相关。Haynes263合金结合了适合各种制造的特性 应用于航空涡轮发动机和工业涡轮机应用。 这些包括低温燃烧器，转换衬管和一些环形部件 压力器皿、高压储藏罐、高压管道、热交换器(化学加工工业)。 　　石油天然气管道、热交换器管件。　　污水处理系统。　　纸浆和造纸工业分类器、漂白设备、贮存处理系统。　　 高强度耐腐蚀环境下的回转轴、压榨辊、叶片、叶轮等。　　轮船或卡车的货物箱　　食品加工设备 PRODUCT PARAMETERS 产品参数 化学成分%CCrMoMnNiCoPbSSiBiBCuAlTiFeMin0.0419.05.6余量19.01.9Max0.0821.06.10.6余量21.00.0020.0070.40.00010.0050.20.62.80.7 上一页：N07263