19811880

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{5003}}^1$

素因数の和:5031

約数の個数: 96

約数和(自身を含む): 70256160

約数和(自身を除く): 50444280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 18, 20, 22, 24, 30, 33, 36, 40, 44, 45, 55, 60, 66, 72, 88, 90, 99, 110, 120, 132, 165, 180, 198, 220, 264, 330, 360, 396, 440, 495, 660, 792, 990, 1320, 1980, 3960, 5003, 10006, 15009, 20012, 25015, 30018, 40024, 45027, 50030, 55033, 60036, 75045, 90054, 100060, 110066, 120072, 150090, 165099, 180108, 200120, 220132, 225135, 275165, 300180, 330198, 360216, 440264, 450270, 495297, 550330, 600360, 660396, 825495, 900540, 990594, 1100660, 1320792, 1650990, 1801080, 1981188, 2201320, 2476485, 3301980, 3962376, 4952970, 6603960, 9905940, 19811880]

約数ペア:

[(1, 19811880), (2, 9905940), (3, 6603960), (4, 4952970), (5, 3962376), (6, 3301980), (8, 2476485), (9, 2201320), (10, 1981188), (11, 1801080), (12, 1650990), (15, 1320792), (18, 1100660), (20, 990594), (22, 900540), (24, 825495), (30, 660396), (33, 600360), (36, 550330), (40, 495297), (44, 450270), (45, 440264), (55, 360216), (60, 330198), (66, 300180), (72, 275165), (88, 225135), (90, 220132), (99, 200120), (110, 180108), (120, 165099), (132, 150090), (165, 120072), (180, 110066), (198, 100060), (220, 90054), (264, 75045), (330, 60036), (360, 55033), (396, 50030), (440, 45027), (495, 40024), (660, 30018), (792, 25015), (990, 20012), (1320, 15009), (1980, 10006), (3960, 5003)]