Invoke class getters with use of private members

I have a class like this:

export class Test {
  #foo
  #bar

  constructor() {}

  get foo() {
    if (!this.#foo) this.#foo = 1 * 1
    return this.#foo
  }

  get bar() {
    if (!this.#bar) this.#bar = 2 * 2
    return this.#bar
  }
}

I need all the getters results in this class so I want to invoke all of them.
I have tried to invoke them outside the class but there are private members in the class so I get an error:

TypeError: Cannot read private member #foo from an object whose class did not declare it

I have tried to invoke them inside the constructor by looping on Object.getOwnPropertyNames(this) but this don’t invoke the getters.

Is there a way I can invoke them inside the class so the getters can use the private members?

Thanks!