2^1 = 2　　0x02        2^2 = 4　　0x042^3 = 8　　0x082^4 = 16　　0x10　　　2^5 = 32　　0x202^6 = 64　　0x402^7 = 128　　0x802^8 = 256　　0x1002^9 = 512　　0x2002^10 = 1024　　0x4002^11 = 2048　　0x8002^12 = 4096　　0x1000　　2^13 = 8192　　0x20002^14 = 16384　　0x40002^15 = 32768　　0x80002^16 = 65536　　0x100002^17 = 131072　　0x200002^18 = 262144　　0x400002^19 = 524288　　0x800002^20 = 1048576　　0x100000　　2^21 = 2097152　　0x2000002^22 = 4194304　　0x4000002^23 = 8388608　　0x800000　　2^24 = 16777216　　0x1000000　　2^25 = 33554432　　0x20000002^26 = 67108864　　0x40000002^27 = 134217728　　0x80000002^28 = 268435456　　0x100000002^29 = 536870912　　0x200000002^30 = 1073741824　　0x40000000　　2^31 = 2147483648　　0x800000002^32 = 4294967296　　0x1000000002^33 = 8589934592　　0x2000000002^34 = 17179869184　　0x4000000002^35 = 34359738368　　0x800000000　　2^36 = 68719476736　　0x10000000002^37 = 137438953472　　2^38 = 2748779069442^39 = 5497558138882^40 = 10995116277762^41 = 21990232555522^42 = 43980465111042^43 = 87960930222082^44 = 175921860444162^45 = 351843720888322^46 = 703687441776642^47 = 1407374883553282^48 = 2814749767106562^49 = 5629499534213122^50 = 11258999068426242^51 = 22517998136852482^52 = 45035996273704962^53 = 90071992547409922^54 = 180143985094819842^55 = 360287970189639682^56 = 720575940379279362^57 = 1441151880758558722^58 = 2882303761517117442^59 = 5764607523034234882^60 = 11529215046068469762^61 = 23058430092136939522^62 = 46116860184273879042^63 = 92233720368547758082^64 = 18446744073709551616