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# Python | sympy.factorint() method

With the help of sympy.factorint() method, we can find the factors and their corresponding multiplicities of a given integer. For input less than 2, factorint() behaves as follows:

• – returns the empty factorization {}.
• – returns .
• – adds to the factors and then factors .

Syntax:
factorint(n)

Parameter:
n – It denotes an integer.

Returns:
Returns a dictionary containing the prime factors of n as keys
and their respective multiplicities as values.

Example #1:

 `# import factorint() method from sympy``from` `sympy ``import` `factorint`` ` `n ``=` `2``*``*``3` `*` `3``*``*``4` `*` `5``*``*``6`` ` `# Use factorint() method ``factor_dict ``=` `factorint(n) ``     ` `print``(``"Dictionary containing factors of {} with respective multiplicities : {}"``.``      ``format``(n, factor_dict))`

Output:

```Dictionary containing factors of 10125000
with respective multiplicities : {2: 3, 3: 4, 5: 6}
```

Example #2:

 `# import factorint() method from sympy``from` `sympy ``import` `factorint`` ` `n ``=` `6``*``*``4` `*` `13`` ` `# Use factorint() method ``factor_dict ``=` `factorint(n) ``     ` `print``(``"Dictionary containing factors of {} with respective multiplicities : {}"``.``      ``format``(n, factor_dict))`

Output:

```Dictionary containing factors of 16848
with respective multiplicities : {2: 4, 3: 4, 13: 1}
```

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