20615361

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:725

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 11318079

約数列:

[1, 3, 13, 19, 39, 43, 57, 129, 247, 559, 647, 741, 817, 1677, 1941, 2451, 8411, 10621, 12293, 25233, 27821, 31863, 36879, 83463, 159809, 361673, 479427, 528599, 1085019, 1585797, 6871787, 20615361]

約数ペア:

[(1, 20615361), (3, 6871787), (13, 1585797), (19, 1085019), (39, 528599), (43, 479427), (57, 361673), (129, 159809), (247, 83463), (559, 36879), (647, 31863), (741, 27821), (817, 25233), (1677, 12293), (1941, 10621), (2451, 8411)]