Radical of an integer
In number theory, the radical of a positive integer n is defined as the product of the distinct prime numbers dividing n (each prime factor of n occurs exactly once as a factor of the product mentioned):
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![\displaystyle\mathrm{rad}(n)=\prod_{\scriptstyle p\mid n\atop p\text{ prime}}p](/Images/godic/202502/05/30b922c768ab48c7fa0d86b7b75506340844.png")