如题，水一贴。
规模值参考keating公式（http://xzqh.info/lt/read.php?tid=171594）其中按照keating回复的公式可计算出原楼主逆向出的常数k精确值为（根号10）*10e6。
不知道和大家平时体感上乡镇规模大/小的省份是否重合。随后会贴出按照平均人口和平均面积排序的序列方便查看。
地区乡级平均规模乡级平均面积乡级平均人口乡级个数面积(平方公里)常住人口(万人)新疆维吾尔自治区0.2649322371404.11792.235800344116216315852598广东省0.26289248111.38003727.877247365161317965612706内蒙古自治区0.2471145821117.562.337560976102511454992396上海市0.2280842338.8790697711.5674418621583592487江苏省0.20233423986.176232826.89248181112371066008526青海省0.1930726611724.3737621.47029703404696647594海南省0.192189195161.36238534.78440367218351771043湖北省0.177988188147.56904764.63333333312601859375838广西壮族自治区0.174081703189.17675164.00238853512562376065027云南省0.169871808268.7138853.27699859714263831864673山东省0.16315762586.521095895.546849315182515790110123北京市0.13938316847.830903796.373177843343164062186宁夏回族自治区0.138634879213.5514403324351893729黑龙江省0.136597919344.13536122.3285171113154525383062浙江省0.13512446777.350439884.85850439913641055066627福建省0.12627089111.86913363.77527075811081239514183安徽省0.12203417292.076215514.02168199715221401406121陕西省0.118570097156.13059983.00075930113172056243952天津市0.11770557447.289682545.412698413252119171364湖南省0.111357321108.85714293.37512846919462118366568吉林省0.107057928197.11546392.4113402069701912022339四川省0.106841255156.76104482.6984843631014861168368河南省0.10360162967.37047583.99145994324591656649815辽宁省0.102245041109.58567213.08862629213541483794182甘肃省0.101876872314.07743361.81784660813564258892465河北省0.09486310883.649068323.27994676122541885457393山西省0.094742607122.42031252.707812512801566983466江西省0.092797217105.58886782.85578747615811669364515重庆市0.08748505879.89718723.0950533461031823743191贵州省0.087410282116.62185432.55960264915101760993865西藏自治区0.0667536221690.8424750.5133614637111202189365