◆ わからない問題はここに書いてね 206 ◆
507 ：１３２人目の素数さん：
(a,b,c,d)=
(-p(p+q)r,-q(p+q)r,1,pqr),(-pqr,1,p(p+q)r,q(p+q)r),(-p,2,2,p),
(-6,2,3,3),(-12,2,3,4),(-30,2,3,5),(2,3,7,42),(2,3,8,24),(2,3,9,18),
(2,3,10,15),(2,3,12,12),(2,4,5,20),(2,4,6,12),(2,4,8,8),(2,5,5,10),
(2,6,6,6),(3,3,4,12),(3,3,6,6),(3,4,4,6),(4,4,4,4).
(-p(p+q)r,-q(p+q)r,1,pqr),(-pqr,1,p(p+q)r,q(p+q)r),(-p,2,2,p),
(-6,2,3,3),(-12,2,3,4),(-30,2,3,5),(2,3,7,42),(2,3,8,24),(2,3,9,18),
(2,3,10,15),(2,3,12,12),(2,4,5,20),(2,4,6,12),(2,4,8,8),(2,5,5,10),
(2,6,6,6),(3,3,4,12),(3,3,6,6),(3,4,4,6),(4,4,4,4).
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