一個半徑為r的球體處于一個正方體之中,球和正方體每個面都相接觸
讓我們把"prd"數(shù)定義為一個這樣的數(shù):它的所有正因數(shù)的乘積(不包括這個數(shù)本身)大于這個數(shù)本身.
英語翻譯
英語翻譯
a sphere of radius r inside a cube touches each one of the six sides of the cube.
let a "prd" number be defined as one in which the product of the positive divisors of the number,not including the number itself,is greater than the number.
a sphere of radius r inside a cube touches each one of the six sides of the cube.
let a "prd" number be defined as one in which the product of the positive divisors of the number,not including the number itself,is greater than the number.
英語人氣：713 ℃時間：2020-05-21 09:35:39
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