20881800

素因数分解:

$2^3\times 3^4\times 5^2\times {\mathrm{1289}}^1$

素因数の和:1317

約数の個数: 120

約数和(自身を含む): 72581850

約数和(自身を除く): 51700050

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 27, 30, 36, 40, 45, 50, 54, 60, 72, 75, 81, 90, 100, 108, 120, 135, 150, 162, 180, 200, 216, 225, 270, 300, 324, 360, 405, 450, 540, 600, 648, 675, 810, 900, 1080, 1289, 1350, 1620, 1800, 2025, 2578, 2700, 3240, 3867, 4050, 5156, 5400, 6445, 7734, 8100, 10312, 11601, 12890, 15468, 16200, 19335, 23202, 25780, 30936, 32225, 34803, 38670, 46404, 51560, 58005, 64450, 69606, 77340, 92808, 96675, 104409, 116010, 128900, 139212, 154680, 174015, 193350, 208818, 232020, 257800, 278424, 290025, 348030, 386700, 417636, 464040, 522045, 580050, 696060, 773400, 835272, 870075, 1044090, 1160100, 1392120, 1740150, 2088180, 2320200, 2610225, 3480300, 4176360, 5220450, 6960600, 10440900, 20881800]

約数ペア:

[(1, 20881800), (2, 10440900), (3, 6960600), (4, 5220450), (5, 4176360), (6, 3480300), (8, 2610225), (9, 2320200), (10, 2088180), (12, 1740150), (15, 1392120), (18, 1160100), (20, 1044090), (24, 870075), (25, 835272), (27, 773400), (30, 696060), (36, 580050), (40, 522045), (45, 464040), (50, 417636), (54, 386700), (60, 348030), (72, 290025), (75, 278424), (81, 257800), (90, 232020), (100, 208818), (108, 193350), (120, 174015), (135, 154680), (150, 139212), (162, 128900), (180, 116010), (200, 104409), (216, 96675), (225, 92808), (270, 77340), (300, 69606), (324, 64450), (360, 58005), (405, 51560), (450, 46404), (540, 38670), (600, 34803), (648, 32225), (675, 30936), (810, 25780), (900, 23202), (1080, 19335), (1289, 16200), (1350, 15468), (1620, 12890), (1800, 11601), (2025, 10312), (2578, 8100), (2700, 7734), (3240, 6445), (3867, 5400), (4050, 5156)]