1.#include<stdio.h>void main(){ int i,j,m,sum=0; for(j=1;j<=5;j++) { m=1; for( i=j;i>0;i--) m*=i; sum+=m; printf("%d!+",j); } printf("\b=%d\n",sum);}2.#include<stdio.h>void main(){ int i,j; scanf("%d",&i); printf("%d=",i); for(j=2;j<=i;j++) if(i%j==0) { i/=j; printf("%d",j); if(i!=1) printf("*"); j=1; } printf("\n");}