The factors from 1 to 30 are:
The factor of 1: 1;
The factors of 2: 1, 2;
The factors of 3: 1, 3;
The factors of 4: 1, 2, 4;
The factors of 5: 1, 5;
The factors of 6 : 1, 2, 3, 6;
The factors of 7: 1, 7;
The factors of 8: 1, 2, 4, 8;
The factors of 9: 1, 3, 9;
The factors of 10: 1, 2, 5, 10;
The factors of 11: 1, 11;
The factors of 12: 1, 2, 3, 4, 6, 12;
The factors of 13: 1, 13;
The factors of 14: 1, 2, 7, 14 ;
The factors of 15: 1, 3, 5, 15;
The factors of 16: 1, 2, 4, 8, 16;
The factors of 17 Factors: 1, 17;
Factors of 18: 1, 2, 3, 6, 9, 18;
Factors of 19: 1, 19;
Factors of 20: 1, 2, 4, 5, 10, 20;
Factors of 21: 1, 3, 7, 21;
Factors of 22: 1, 2 , 11, 22;
The factors of 23: 1, 23;
The factors of 24: 1, 2, 3, 4, 6, 8, 12, 24;
The factors of 25: 1, 5, 25;
The factors of 26: 1, 2, 13, 26;
The factors of 27: 1, 3, 9, 27;
The factors of 28: 1, 2, 4, 7, 14, 28;
The factors of 29: 1, 29;
The factors of 30 : 1, 2, 3, 5, 6, 10, 15, 30;
Extended information:
If a*b=c (a, b, c are all integers) , then we say a and b are factors of c. It should be noted that this relationship is only true when the dividend, divisor, and quotient are all integers and the remainder is zero. Conversely, we call c a multiple of a and b. When studying factors and multiples, zero is not considered.
In primary school mathematics, when two positive integers are multiplied, both numbers are called factors of the product, or divisors.
In fact, factors are generally defined on integers: let A be an integer and B be a non-zero integer. If there is an integer Q such that A=QB, then B is said to be a factor of A, denoted as B|A . However, some authors do not require B≠0.
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