Numbers which are the cube roots of the product of their proper divisors

Numbers which are the cube roots of the product of their proper divisors is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Example

Consider the number 24. Its proper divisors are: 1, 2, 3, 4, 6, 8 and 12. Their product is 13,824 and the cube root of this is 24. So 24 satisfies the definition in the task title.

Task

Compute and show here the first 50 positive integers which are the cube roots of the product of their proper divisors.

Also show the 500th and 5,000th such numbers.

Stretch

Compute and show the 50,000th such number.

Reference

• OEIS:A111398 - Numbers which are the cube roots of the product of their proper divisors.

Note

OEIS considers 1 to be the first number in this sequence even though, strictly speaking, it has no proper divisors. Please therefore do likewise.

Wren

Library: Wren-math

Library: Wren-fmt

import "./math" for Int, Nums
import "./fmt" for Fmt

var numbers50 = []
var count = 0
var n = 1
System.print("First 50 numbers which are the cube roots of the products of their proper divisors:")
while (true) {
    var pd = Int.properDivisors(n)
    if (Nums.prod(pd) == n * n * n) {
        count = count + 1
        if (count <= 50) {
            numbers50.add(n)
            if (count == 50) Fmt.tprint("$3d", numbers50, 10)
        } else if (count == 500) {
            Fmt.print("\n500th   : $,d", n)
        } else if (count == 5000) {
            Fmt.print("5,000th : $,d", n)
        } else if (count == 50000) {
            Fmt.print("50,000th: $,d", n)  
            break
        }
    }
    n = n + 1
}

Output:

First 50 numbers which are the cube roots of the products of their proper divisors:
  1  24  30  40  42  54  56  66  70  78 
 88 102 104 105 110 114 128 130 135 136 
138 152 154 165 170 174 182 184 186 189 
190 195 222 230 231 232 238 246 248 250 
255 258 266 273 282 285 286 290 296 297 

500th   : 2,526
5,000th : 23,118
50,000th: 223,735