<Root>
<Number1>10</Number1>
<Number2>72</Number2>
<Number3>73</Number3>
<Number4>46</Number4>
<Number5>55</Number5>
</Root>

@XmlRootElement(name = "Root")
public class Root implements Serializable {

    private List<Integer> numbers = new ArrayList<>(5); // числа


  public Root() { }



    public List<Integer> getNumbers() {
        return numbers;
    }

        @XmlElement
        public void setNumbers(List<Integer> numbers) {
        this.numbers = numbers;
    }

 Root instance = new Root();
 List<Integer> list = Arrays.asList(10, 72, 73, 46, 55);
 instance.setNumbers(list);

        JAXBContext jaxbContext = JAXBContext.newInstance(Root.class);
        Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

        // output pretty printed
        jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        jaxbMarshaller.marshal(instance, System.out);

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Root>
    <Number>10</Number>
    <Number>72</Number>
    <Number>73</Number>
    <Number>46</Number>
    <Number>55</Number>
 </Root>

<Root>
<Number1>10</Number1>
<Number2>72</Number2>
<Number3>73</Number3>
<Number4>46</Number4>
<Number5>55</Number5>
</Root>