Ejercicio y resolución

¿Cuántas veces aparece el 2 como factor en el número 100!?

-Mañana os doy la resolución. Os dejo pensarlo

 2(lo añadimos al final)

4 = 2 * 2                      2

6 = 2 * 3                      3

8 = 2 * 2 * 2                  6

9 = 3 * 3

10 = 2 * 5                     7

12 = 2 * 2 * 3                 9

14 = 2 * 7                     10

15 = 3 * 5

16 = 2 * 2 * 2 * 2             14

18 = 2 * 3 * 3                 15

20 = 2 * 2 * 5                 17

21 = 3 * 7

22 = 2 * 11                    18

24 = 2 * 2 * 2 * 3             21

25 = 5 * 5

26 = 2 * 13                    22

27 = 3 * 3 * 3

28 = 2 * 2 * 7                 24

30 = 2 * 3 * 5                 25

32 = 2 * 2 * 2 * 2 * 2         30

33 = 3 * 11

34 = 2 * 17                    31

35 = 5 * 7

36 = 2 * 2 * 3 * 3             33

38 = 2 * 19                    34

39 = 3 * 13

40 = 2 * 2 * 2 * 5             37

42 = 2 * 3 * 7                 38

44 = 2 * 2 * 11                40

45 = 3 * 3 * 5

46 = 2 * 23                    41

48 = 2 * 2 * 2 * 2 * 3         45

49 = 7 * 7

50 = 2 * 5 * 5                 46

51 = 3 * 17

52 = 2 * 2 * 13                48

54 = 2 * 3 * 3 * 3             49

55 = 5 * 11

56 = 2 * 2 * 2 * 7             52

57 = 3 * 19

58 = 2 * 29                    53

60 = 2 * 2 * 3 * 5             55

62 = 2 * 31                    56

63 = 3 * 3 * 7

64 = 2 * 2 * 2 * 2 * 2 * 2     62

65 = 5 * 13

66 = 2 * 3 * 11                63

68 = 2 * 2 * 17                65

69 = 3 * 23

70 = 2 * 5 * 7                 66

72 = 2 * 2 * 2 * 3 * 3         69

74 = 2 * 3775 =

75 = 3 * 5 * 5

76 = 2 * 2 * 19                72

77 = 7 * 11

78 = 2 * 3 * 13                73

80 = 2 * 2 * 2 * 2 * 5         77

81 = 3 * 3 * 3 * 3

82 = 2 * 41                    78

84 = 2 * 2 * 3 * 7             80

85 = 5 * 17

86 = 2 * 43                    81

87 = 3 * 29

88 = 2 * 2 * 2 * 11            84

90 = 2 * 3 * 3 * 5             85

91 = 7 * 13

92 = 2 * 2 * 23                87

93 = 3 * 31

94 = 2 * 47                    88

95 = 5 * 19

96 = 2 * 2 * 2 * 2 * 2 * 3     93

98 = 2 * 7 * 7                 94

99 = 3 * 3 * 11

100 = 2 * 2 * 5 * 5            96 + 1 = 97

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