How to use the @rxweb/reactive-form-validators.RxwebValidators.factor function in @rxweb/reactive-form-validators

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            fourthNumber:['', RxwebValidators.factor({dividend:50  ,message:'{{0}} is not a factor of 50' })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            firstNumber:['',], 
            thirdNumber:['', RxwebValidators.factor({fieldName:"firstNumber"  ,conditionalExpression:'x => x.firstNumber == 25' })], 
            secondNumber:['', RxwebValidators.factor({fieldName:"firstNumber"  ,conditionalExpression:(x,y) =>x.firstNumber == 25  })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            firstNumber:['', RxwebValidators.factor({dividend:50 })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            fourthNumber:['', RxwebValidators.factor({dividend:50  ,message:'{{0}} is not a factor of 50' })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            fourthNumber:['', RxwebValidators.factor({dividend:50 })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            firstNumber:['',], 
            fifthNumber:['', RxwebValidators.factor({fieldName:'firstNumber' })], 
            secondNumber:['', RxwebValidators.factor({fieldName:'firstNumber'  ,conditionalExpression:(x,y) =>x.firstNumber == 25  })], 
            thirdNumber:['', RxwebValidators.factor({fieldName:'firstNumber'  ,conditionalExpression:'x => x.firstNumber == 25' })], 
            fourthNumber:['', RxwebValidators.factor({dividend:50 })], 
            sixthNumber:['', RxwebValidators.factor({dividend:30  ,message:'{{0}} is not a factor of 50' })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            firstNumber:['',], 
            fifthNumber:['', RxwebValidators.factor({fieldName:"firstNumber" })], 
            secondNumber:['', RxwebValidators.factor({fieldName:"firstNumber"  ,conditionalExpression:(x,y) =>x.firstNumber == 25  })], 
            thirdNumber:['', RxwebValidators.factor({fieldName:"firstNumber"  ,conditionalExpression:'x => x.firstNumber == 25' })], 
            fourthNumber:['', RxwebValidators.factor({dividend:50  ,message:'{{0}} is not a factor of 50' })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            firstNumber:['',], 
            thirdNumber:['', RxwebValidators.factor({fieldName:"firstNumber"  ,conditionalExpression:'x => x.firstNumber == 25' })], 
            fifthNumber:['', RxwebValidators.factor({fieldName:"firstNumber" })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            firstNumber:['',], 
            thirdNumber:['', RxwebValidators.factor({fieldName:"firstNumber"  ,conditionalExpression:'x => x.firstNumber == 25' })], 
            secondNumber:['', RxwebValidators.factor({fieldName:"firstNumber"  ,conditionalExpression:(x,y) =>x.firstNumber == 25  })], 
        });
    }
}

ngOnInit() {
        this.userFormGroup = this.formBuilder.group({
            sixthNumber:['', RxwebValidators.factor({dividend:30  ,message:'{{0}} is not a factor of 50' })], 
        });
    }
}