20805345

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{3821}}^1$

素因数の和:3854

約数の個数: 36

約数和(自身を含む): 39649428

約数和(自身を除く): 18844083

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 121, 165, 363, 495, 605, 1089, 1815, 3821, 5445, 11463, 19105, 34389, 42031, 57315, 126093, 171945, 210155, 378279, 462341, 630465, 1387023, 1891395, 2311705, 4161069, 6935115, 20805345]

約数ペア:

[(1, 20805345), (3, 6935115), (5, 4161069), (9, 2311705), (11, 1891395), (15, 1387023), (33, 630465), (45, 462341), (55, 378279), (99, 210155), (121, 171945), (165, 126093), (363, 57315), (495, 42031), (605, 34389), (1089, 19105), (1815, 11463), (3821, 5445)]