# 1から100までの約数表と約数の計算問題プリント（97までの素数リストつき）

## 約数表

1 1 1
2 1, 2 2
3 1, 3 2
4 1, 2, 4 3
5 1, 5 2
6 1, 2, 3, 6 4
7 1, 7 2
8 1, 2, 4, 8 4
9 1, 3, 9 3
10 1, 2, 5, 10 4
11 1, 11 2
12 1, 2, 3, 4, 6, 12 6
13 1, 13 2
14 1, 2, 7, 14 4
15 1, 3, 5, 15 4
16 1, 2, 4, 8, 16 5
17 1, 17 2
18 1, 2, 3, 6, 9, 18 6
19 1, 19 2
20 1, 2, 4, 5, 10, 20 6
21 1, 3, 7, 21 4
22 1, 2, 11, 22 4
23 1, 23 2
24 1, 2, 3, 4, 6, 8, 12, 24 8
25 1, 5, 25 3
26 1, 2, 13, 26 4
27 1, 3, 9, 27 4
28 1, 2, 4, 7, 14, 28 6
29 1, 29 2
30 1, 2, 3, 5, 6, 10, 15, 30 8
31 1, 31 2
32 1, 2, 4, 8, 16, 32 6
33 1, 3, 11, 33 4
34 1, 2, 17, 34 4
35 1, 5, 7, 35 4
36 1, 2, 3, 4, 6, 9, 12, 18, 36 9
37 1, 37 2
38 1, 2, 19, 38 4
39 1, 3, 13, 39 4
40 1, 2, 4, 5, 8, 10, 20, 40 8
41 1, 41 2
42 1, 2, 3, 6, 7, 14, 21, 42 8
43 1, 43 2
44 1, 2, 4, 11, 22, 44 6
45 1, 3, 5, 9, 15, 45 6
46 1, 2, 23, 46 4
47 1, 47 2
48 1, 2, 3, 4, 6, 8, 12, 16, 24, 48 10
49 1, 7, 49 3
50 1, 2, 5, 10, 25, 50 6
51 1, 3, 17, 51 4
52 1, 2, 4, 13, 26, 52 6
53 1, 53 2
54 1, 2, 3, 6, 9, 18, 27, 54 8
55 1, 5, 11, 55 4
56 1, 2, 4, 7, 8, 14, 28, 56 8
57 1, 3, 19, 57 4
58 1, 2, 29, 58 4
59 1, 59 2
60 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 12
61 1, 61 2
62 1, 2, 31, 62 4
63 1, 3, 7, 9, 21, 63 6
64 1, 2, 4, 8, 16, 32, 64 7
65 1, 5, 13, 65 4
66 1, 2, 3, 6, 11, 22, 33, 66 8
67 1, 67 2
68 1, 2, 4, 17, 34, 68 6
69 1, 3, 23, 69 4
70 1, 2, 5, 7, 10, 14, 35, 70 8
71 1, 71 2
72 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72 12
73 1, 73 2
74 1, 2, 37, 74 4
75 1, 3, 5, 15, 25, 75 6
76 1, 2, 4, 19, 38, 76 6
77 1, 7, 11, 77 4
78 1, 2, 3, 6, 13, 26, 39, 78 8
79 1, 79 2
80 1, 2, 4, 5, 8, 10, 16, 20, 40, 80 10
81 1, 3, 9, 27, 81 5
82 1, 2, 41, 82 4
83 1, 83 2
84 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84 12
85 1, 5, 17, 85 4
86 1, 2, 43, 86 4
87 1, 3, 29, 87 4
88 1, 2, 4, 8, 11, 22, 44, 88 8
89 1, 89 2
90 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 12
91 1, 7, 13, 91 4
92 1, 2, 4, 23, 46, 92 6
93 1, 3, 31, 93 4
94 1, 2, 47, 94 4
95 1, 5, 19, 95 4
96 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96 12
97 1, 97 2
98 1, 2, 7, 14, 49, 98 6
99 1, 3, 9, 11, 33, 99 6
100 1, 2, 4, 5, 10, 20, 25, 50, 100 9

・素数とは約数が2個（1と自分自身のみ）しかない数をいう。
・平方数の約数は奇数個の約数を持つ。
・約数の個数が12個ある数（60、72、84、90、96）に注意。

96 = 1 × 96
= 2 × 48
= 3 × 32
= 4 × 24
= 6 × 16
= 8 × 12

## 素数一覧

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97