2^22 = 2^11 * 2^11 = 2^10 * 2^10 * 2^2 = 1024*1024*4 = 41943042^10= 2^5 * 2^5 2^5 = 2*2*2*2*2 = 32所以2^10= 2^5 * 2^5 = 32*32 = 1024