# factor

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## factor,

in arithmetic, any number that divides a given number evenly, i.e., without any remainder. The factors of 12 are 1, 2, 3, 4, 6, and 12. Similarly in algebra, any one of the algebraic expressions multiplied by another to form a product is a factor of that product, e.g., a+b and ab are factors of a2b 2, since (a+b)(ab)=a2b2. In general, if r is a rootroot,
in mathematics, number or quantity r for which an equation f(r)=0 holds true, where f is some function. If f is a polynomial, r is called a root of f; for example, r=3 and r
of a polynomialpolynomial,
mathematical expression which is a finite sum, each term being a constant times a product of one or more variables raised to powers. With only one variable the general form of a polynomial is a0xn+a1x
equation f(x)=0, then (xr) is a factor of the polynomial f(x).

## factor

[′fak·tər]
(mathematics)
For an integer n, any integer which gives n when multiplied by another integer.
For a polynomial p, any polynomial which gives p when multiplied by another polynomial.
For a graph G, a spanning subgraph of G with at least one edge.
(statistics)
A quantity or a variable being studied in an experiment as a possible cause of variation.

## factor

1. Maths
a. one of two or more integers or polynomials whose product is a given integer or polynomial
b. an integer or polynomial that can be exactly divided into another integer or polynomial
2. Med any of several substances that participate in the clotting of blood
3. Law, Commerce a person who acts on another's behalf, esp one who transacts business for another
4. former name for a gene
5. Commercial law a person to whom goods are consigned for sale and who is paid a factorage
6. (in Scotland) the manager of an estate

## factor

A quantity which is multiplied by another quantity.

## factor

A number that divides evenly into another number. For example, 3 and 4 are factors of 12. See factorial and IFP.
References in periodicals archive ?
By culturing the mast cell progenitor cells present in blood, which are relatively uncommon (about 10 cells per million white blood cells), the researchers found that mast cell progenitors could survive, divide and partially mature without stem cell factor.
14,15,33) Stem cell factor is produced by fibroblasts, epithelial cells, and even by mast cells themselves and appears to be important in the development, activation, and upregulation of mature mast cells and to the induction of mast cell degranulation.
One study has shown that bronchial smooth muscle cells can express stem cell factor, which may attract mast cells and stimulate their growth.
Nonhematopoietic tumor cell lines express stem cell factor and display c-kit receptors.
Decreased levels of stem cell factor in subjects with incident coronary events," Journal of Internal Medicine, 2015; DOI: 10.
In the study, the researchers administered stem cell factor (SCF) by gene transfer shortly after inducing heart attacks in preclinical models directly into damaged heart tissue to test its regenerative repair response.
The newly identified stem cell factor is BRD4, a protein associated with several cancers and the target of prospective therapies currently in clinical trials.

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