100百以的合数有哪些
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100百以的合数有哪些
100百以的合数有哪些
100百以的合数有哪些
4.6.8.9.10.12.14.15.16.18.20.21.22.24.25.26.27.28.30.32.33.34.35.36.38.39.40.42.44.45.46.48.49.50.51.52.54.55.56.57.58.60.62.63.64.65.66.68.69.70.72.74.75.76.77.78.80.81.82.84.85.86.87.88.90.91.92.93.94.95.96.98.99.100
4=1,2,4 6=1,2,3,6 8=1,2,4,8 9=1,3,9 10=1,5,2,10 12=1,2,3,4,6,12
14=1,2,7,14 15=1,3,5,15 16=1,2,4,8,16 18=1,2,9,18 20=1,2,4,5,10,20
21=1,3,7,21 22=1,11,22,2 24=1,2,3,4,6,12,8,24 25=1,5,25 26=1,2,13,26
27=1,3,9,27 28=1,2,4,7,14 30=1,2,3,5,6,10,15 32=1,2,4,8,16,32 33=1,3,11,33 34=1,2,17,34 35=1,5,7,35 36=1,2,3,4,6,9,12,18,36
38=1,2,19,38 39=1,3,13,39 40=1,2,4,5,8,10,20,40 42=1,3,6,7,14,42
44=1,2,11,4,22,44 45=1,5,9,45,3,15 46=1,2,23,46 48=1,2,3,4,6,8,12,16,24,48 49=1,7,49 50=1,2,5,10,25,50
51=1,51,3,17 52=1,52,2,26,4,13 54=1,54,2,27,3,18,9,6
55=1,55,11,5 56=1,56,2,28,4,14,7,8 57=1,57,3,19 58=1,58,2,29
60=1,60,2,30,3,20,4,15,5,12,6,10 62=1,62,2,31 63=1,63,3,31
64=1,64,2,32,4,16,8 65=1,65,5,13 66=1,66,2,33,3,22,6,11
68=1,68,2,34,4,17 69=1,69,3,23 70=1,70,2,35,5,14,7,10
72=1,72,2,36,3,24,4,18,6,12,8,9 74=1,74,2,37 75=1,75,5,15,3,25
76=1,76,2,38 77=1,77,11,7 78=1,78,2,39,3,26,6,13
80=1,80,2,40,4,20,5,16,8,10
81=1,81,3,27,9 82=1,82,2,41 84=1,84,2,42,3,28,4,21,7,12,6,14
85=1,85,5,17 86=1,86,2,43 87=1,87,3,29 88=1,88,2,44,8,11
90=1,90,2,45,5,18,6,15,10,9,3,30 91=1,91,7,13
92=1,92,2,46,93=1,93,3,31 94=1,94,2,47 95=1,95,5,29
96=1,96,2,48,3,32,4,24,6,16,8,12 98=1,98,2,49,7,14
99=1,99,3,33,9,11 100=1,100,2,50,4,25,5,20,10
答：100以内的质数有25个，合数有74个，1既不是质数也不是合数。（要熟记！）