Get divisors - Java java.lang

Java examples for java.lang:Math Function

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Description

Get divisors

Demo Code

/**//from   w w w .j  a va  2  s .  com
 *
 * maer - Solutions to problems of Project Euler
 * Copyright (C) 2011, Sandeep Gupta
 * http://www.sangupta.com/projects/maer
 *
 * The file is licensed under the the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
//package com.java2s;

import java.util.ArrayList;

import java.util.List;

public class Main {
    public static List<Long> divisors(long number) {
        List<Long> divisors = new ArrayList<Long>();

        // the initial value is 1 because 1 is always a factor of every number
        divisors.add(1l);

        for (int index = 2; index <= (number / 2); index++) {
            if (number % index == 0) {
                divisors.add(new Long(index));
            }
        }

        return divisors;
    }
}

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