19981080

素因数分解:

$2^3\times 3^4\times 5^1\times 7^1\times {\mathrm{881}}^1$

素因数の和:911

約数の個数: 160

約数和(自身を含む): 76839840

約数和(自身を除く): 56858760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 54, 56, 60, 63, 70, 72, 81, 84, 90, 105, 108, 120, 126, 135, 140, 162, 168, 180, 189, 210, 216, 252, 270, 280, 315, 324, 360, 378, 405, 420, 504, 540, 567, 630, 648, 756, 810, 840, 881, 945, 1080, 1134, 1260, 1512, 1620, 1762, 1890, 2268, 2520, 2643, 2835, 3240, 3524, 3780, 4405, 4536, 5286, 5670, 6167, 7048, 7560, 7929, 8810, 10572, 11340, 12334, 13215, 15858, 17620, 18501, 21144, 22680, 23787, 24668, 26430, 30835, 31716, 35240, 37002, 39645, 47574, 49336, 52860, 55503, 61670, 63432, 71361, 74004, 79290, 92505, 95148, 105720, 111006, 118935, 123340, 142722, 148008, 158580, 166509, 185010, 190296, 222012, 237870, 246680, 277515, 285444, 317160, 333018, 356805, 370020, 444024, 475740, 499527, 555030, 570888, 666036, 713610, 740040, 832545, 951480, 999054, 1110060, 1332072, 1427220, 1665090, 1998108, 2220120, 2497635, 2854440, 3330180, 3996216, 4995270, 6660360, 9990540, 19981080]

約数ペア:

[(1, 19981080), (2, 9990540), (3, 6660360), (4, 4995270), (5, 3996216), (6, 3330180), (7, 2854440), (8, 2497635), (9, 2220120), (10, 1998108), (12, 1665090), (14, 1427220), (15, 1332072), (18, 1110060), (20, 999054), (21, 951480), (24, 832545), (27, 740040), (28, 713610), (30, 666036), (35, 570888), (36, 555030), (40, 499527), (42, 475740), (45, 444024), (54, 370020), (56, 356805), (60, 333018), (63, 317160), (70, 285444), (72, 277515), (81, 246680), (84, 237870), (90, 222012), (105, 190296), (108, 185010), (120, 166509), (126, 158580), (135, 148008), (140, 142722), (162, 123340), (168, 118935), (180, 111006), (189, 105720), (210, 95148), (216, 92505), (252, 79290), (270, 74004), (280, 71361), (315, 63432), (324, 61670), (360, 55503), (378, 52860), (405, 49336), (420, 47574), (504, 39645), (540, 37002), (567, 35240), (630, 31716), (648, 30835), (756, 26430), (810, 24668), (840, 23787), (881, 22680), (945, 21144), (1080, 18501), (1134, 17620), (1260, 15858), (1512, 13215), (1620, 12334), (1762, 11340), (1890, 10572), (2268, 8810), (2520, 7929), (2643, 7560), (2835, 7048), (3240, 6167), (3524, 5670), (3780, 5286), (4405, 4536)]