20956005

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{937}}^1$

素因数の和:1026

約数の個数: 48

約数和(自身を含む): 42142464

約数和(自身を除く): 21186459

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 71, 105, 213, 315, 355, 497, 639, 937, 1065, 1491, 2485, 2811, 3195, 4473, 4685, 6559, 7455, 8433, 14055, 19677, 22365, 32795, 42165, 59031, 66527, 98385, 199581, 295155, 332635, 465689, 598743, 997905, 1397067, 2328445, 2993715, 4191201, 6985335, 20956005]

約数ペア:

[(1, 20956005), (3, 6985335), (5, 4191201), (7, 2993715), (9, 2328445), (15, 1397067), (21, 997905), (35, 598743), (45, 465689), (63, 332635), (71, 295155), (105, 199581), (213, 98385), (315, 66527), (355, 59031), (497, 42165), (639, 32795), (937, 22365), (1065, 19677), (1491, 14055), (2485, 8433), (2811, 7455), (3195, 6559), (4473, 4685)]