19892015

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:719

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 8848081

約数列:

[1, 5, 11, 13, 43, 55, 65, 143, 215, 473, 559, 647, 715, 2365, 2795, 3235, 6149, 7117, 8411, 27821, 30745, 35585, 42055, 92521, 139105, 306031, 361673, 462605, 1530155, 1808365, 3978403, 19892015]

約数ペア:

[(1, 19892015), (5, 3978403), (11, 1808365), (13, 1530155), (43, 462605), (55, 361673), (65, 306031), (143, 139105), (215, 92521), (473, 42055), (559, 35585), (647, 30745), (715, 27821), (2365, 8411), (2795, 7117), (3235, 6149)]