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# 因数和倍数

## 因数

### 因数图解

12 个点可以排成 start color #01d1c1, 1, end color #01d1c1 行, 一行start color #01d1c1, 12, end color #01d1c1个点.
start color #01d1c1, 1, times, 12, end color #01d1c1, equals, 12

12个点也可以排成 start color #aa87ff, 2, end color #aa87ff 行, 每行 start color #aa87ff, 6, end color #aa87ff 个点.
start color #aa87ff, 2, times, 6, end color #aa87ff, equals, 12

start color #f9685d, 3, times, 4, end color #f9685d, equals, 12

start color #01d1c1, 1, end color #01d1c1, start color #01d1c1, 12, end color #01d1c1, start color #aa87ff, 2, end color #aa87ff, start color #aa87ff, 6, end color #aa87ff, start color #f9685d, 3, end color #f9685d, 和 start color #f9685d, 4, end color #f9685d 都是 12个因数.

18 的因数是什么?

### 不用绘图找因数

start color #11accd, 1, end color #11accd16的因数, 因为start color #11accd, 1, end color #11accd 可以整除16.
16, divided by, start color #11accd, 1, end color #11accd, equals, start color #11accd, 16, end color #11accd

start color #1fab54, 2, end color #1fab5416的因数, 因为start color #1fab54, 2, end color #1fab54 可以整除16.
16, divided by, start color #1fab54, 2, end color #1fab54, equals, start color #1fab54, 8, end color #1fab54

start color #7854ab, 4, end color #7854ab16的因数, 因为start color #7854ab, 4, end color #7854ab 可以整除16.
16, divided by, start color #7854ab, 4, end color #7854ab, equals, start color #7854ab, 4, end color #7854ab

16的因数是 start color #11accd, 1, comma, 16, end color #11accd, start color #1fab54, 2, comma, 8, end color #1fab54, commastart color #7854ab, 4, end color #7854ab.
35 不是16 的因数, 因为它们不能整除16.

因数 $1$1 $2$2 $3$3 $5$5 $7$7 $35$35

## 因数技巧

110的因数.
1364的因数.
15, comma, 787的因数.

4141的因数.
128128的因数.
4, comma, 3794, comma, 379的因数.

## 因数对

start color #11accd, 1, end color #11accdstart color #11accd, 20, end color #11accd

start color #1fab54, 2, end color #1fab54 和哪个整数相乘可以得到20呢? 是的. start color #1fab54, 2, end color #1fab54, times, start color #1fab54, 10, end color #1fab54, equals, 20. 所以 start color #1fab54, 2, end color #1fab54start color #1fab54, 10, end color #1fab54 是另一对因数对.
start color #11accd, 1, end color #11accdstart color #1fab54, 2, end color #1fab54start color #1fab54, 10, end color #1fab54start color #11accd, 20, end color #11accd

start color #e84d39, 4, end color #e84d39 乘以一个整数可以得到 20 吗? 是的. start color #e84d39, 4, end color #e84d39, times, start color #e84d39, 5, end color #e84d39, equals, 20. 所以 start color #e84d39, 4, end color #e84d39start color #e84d39, 5, end color #e84d39 是一对因数对.
start color #11accd, 1, end color #11accdstart color #1fab54, 2, end color #1fab54start color #e84d39, 4, end color #e84d39start color #e84d39, 5, end color #e84d39start color #1fab54, 10, end color #1fab54start color #11accd, 20, end color #11accd

## 倍数

start color #6495ed, 3, end color #6495ed, times, 1, equals, 3
start color #6495ed, 3, end color #6495ed, times, 2, equals, 6
start color #6495ed, 3, end color #6495ed, times, 3, equals, 9
start color #6495ed, 3, end color #6495ed, times, 4, equals, 12
start color #6495ed, 3, end color #6495ed 的倍数还有 15, comma, 30300.
start color #6495ed, 3, end color #6495ed, times, 5, equals, 15
start color #6495ed, 3, end color #6495ed, times, 10, equals, 30
start color #6495ed, 3, end color #6495ed, times, 100, equals, 300

### 练习

7, times, 1, equals, 7.
7的下两个倍数是什么?
7, times, 2, equals

7, times, 3, equals

4, comma, 8, comma, 12, comma, 16, comma, point, point, point
4的下一个倍数是多少?

8, comma, 16,
, 32, comma, 40, comma, 48,
...

6的倍数是哪些?

### 倍数图解

4, times, 1, equals, 4
4, times, 2, equals, 8
4, times, 3, equals, 12

### 因素和倍数是什么关系?

start color #e07d10, 4, end color #e07d10start color #1fab54, 7, end color #1fab54 都是 start color #11accd, 28, end color #11accd 因数. 因为它们都可以整除start color #11accd, 28, end color #11accd.
start color #11accd, 28, end color #11accdstart color #e07d10, 4, end color #e07d10倍数 ,也是start color #1fab54, 7, end color #1fab54倍数.
324完成下列语句.