20489391

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{709}}^1$

素因数の和:760

約数の個数: 36

約数和(自身を含む): 33781800

約数和(自身を除く): 13292409

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 169, 171, 247, 507, 709, 741, 1521, 2127, 2223, 3211, 6381, 9217, 9633, 13471, 27651, 28899, 40413, 82953, 119821, 121239, 175123, 359463, 525369, 1078389, 1576107, 2276599, 6829797, 20489391]

約数ペア:

[(1, 20489391), (3, 6829797), (9, 2276599), (13, 1576107), (19, 1078389), (39, 525369), (57, 359463), (117, 175123), (169, 121239), (171, 119821), (247, 82953), (507, 40413), (709, 28899), (741, 27651), (1521, 13471), (2127, 9633), (2223, 9217), (3211, 6381)]