20110120

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2003}}^1$

素因数の和:2265

約数の個数: 32

約数和(自身を含む): 45450720

約数和(自身を除く): 25340600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2003, 2008, 2510, 4006, 5020, 8012, 10015, 10040, 16024, 20030, 40060, 80120, 502753, 1005506, 2011012, 2513765, 4022024, 5027530, 10055060, 20110120]

約数ペア:

[(1, 20110120), (2, 10055060), (4, 5027530), (5, 4022024), (8, 2513765), (10, 2011012), (20, 1005506), (40, 502753), (251, 80120), (502, 40060), (1004, 20030), (1255, 16024), (2003, 10040), (2008, 10015), (2510, 8012), (4006, 5020)]