# Divisors of the Positive Integer 1561

1, 7, 223, 1561## Sum of all the Divisors of 1561, including itself

1792## Sum of the Proper Divisors of 1561

231## Properties of the number 1561

The integer 1561 is an**odd**number.

The integer 1561 is a

**Composite**number.

231 is

*less than*1561, so 1561 is a

**deficient**number.

## The number 1561 as a Roman Numeral

**MDLXI**

## The number 1561 in various Numeral Systems

Base |
Representation |
---|---|

2: | 11000011001 |

3: | 2010211 |

4: | 120121 |

5: | 22221 |

6: | 11121 |

7: | 4360 |

8: | 3031 |

9: | 2124 |

10: | 1561 |

11: | 119A |

12: | AA1 |

13: | 931 |

14: | 7D7 |

15: | 6E1 |

16: | 619 |

17: | 56E |

18: | 4ED |

19: | 463 |

20: | 3I1 |

21: | 3B7 |

22: | 34L |

23: | 2LK |

24: | 2H1 |

25: | 2CB |

26: | 281 |

27: | 23M |

28: | 1RL |

29: | 1OO |

30: | 1M1 |

31: | 1JB |

32: | 1GP |

33: | 1EA |

34: | 1BV |

35: | 19L |

36: | 17D |