1008的所有因數(shù)之和是________.
1955
分析:先找出1008的所有因數(shù)有1,2,3,4,6,7,8,9,12,14,16,18,21,24,28,36,42,48,56,112,144,336,1008,然后把它們相加即可.
解答:1008的所有因數(shù)有1,2,3,4,6,7,8,9,12,14,16,18,21,24,28,36,42,48,56,112,144,336,1008,
1+2+3+4+6+7+8+9+12+14+16+18+21+24+28+36+42+48+56+112+144+336+1008=1955;
故答案為:1955.
點評:此類題做題的關(guān)鍵是先找出28的約數(shù),然后根據(jù)題意,相加即可得出結(jié)論.