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What is the sum of all positive integers v for which lcm[v,20]=60?

 Jul 7, 2018
 #1
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3 +  6 +  12 + 15 + 30 =66

 Jul 7, 2018
 #2
avatar+100569 
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I believe we  need  to include 60, as well

 

So...the sum  is   66 + 60   =   126

 

 

cool cool cool

 Jul 7, 2018
 #3
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+1

https://web2.0calc.com/questions/what-is-the-sum-of-all-positive-integers-v-for-which-lcm-v-20-60#r1

 Jul 8, 2018

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