Now find the odd factors which are of the form 3m+1
Since the factors are odd, we don't have to consider the factors containing 2. and since it is of the form 3m+1, we dont have to consider factors containing 3.
Now only 52 and 7 are left. these form the factors 1, 5 , 7 , 25, 35 and 175 .
Only 7,25 and 175 are of the form 3m+1 .
( note that 1 = 3(0) +1 , but 0 is not a natural no.)
Moderation Team
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