我知道是gwd但是找不到在哪里了?表好意思了.
If p is the product of the integers from 1 to 30, inclusive, what is the greatest integer k for which 3k is a factor of p?
A. 10
B. 12
C. 14
D. 16
E. 18
我觉得这个k,怎么会是算1-30里面有多少个3呢?实在头疼死了.麻烦帮助点解一下阿.
p=1×2×3×4~~~~~~~~×30
p的最大因子3k =3×6×9×12×15×18×21×24×27×30=N×314
N为其余的因子
so,k的最大值为14
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