19984440

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{643}}^1$

素因数の和:701

約数の個数: 128

約数和(自身を含む): 70479360

約数和(自身を除く): 50494920

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 37, 40, 42, 56, 60, 70, 74, 84, 105, 111, 120, 140, 148, 168, 185, 210, 222, 259, 280, 296, 370, 420, 444, 518, 555, 643, 740, 777, 840, 888, 1036, 1110, 1286, 1295, 1480, 1554, 1929, 2072, 2220, 2572, 2590, 3108, 3215, 3858, 3885, 4440, 4501, 5144, 5180, 6216, 6430, 7716, 7770, 9002, 9645, 10360, 12860, 13503, 15432, 15540, 18004, 19290, 22505, 23791, 25720, 27006, 31080, 36008, 38580, 45010, 47582, 54012, 67515, 71373, 77160, 90020, 95164, 108024, 118955, 135030, 142746, 166537, 180040, 190328, 237910, 270060, 285492, 333074, 356865, 475820, 499611, 540120, 570984, 666148, 713730, 832685, 951640, 999222, 1332296, 1427460, 1665370, 1998444, 2498055, 2854920, 3330740, 3996888, 4996110, 6661480, 9992220, 19984440]

約数ペア:

[(1, 19984440), (2, 9992220), (3, 6661480), (4, 4996110), (5, 3996888), (6, 3330740), (7, 2854920), (8, 2498055), (10, 1998444), (12, 1665370), (14, 1427460), (15, 1332296), (20, 999222), (21, 951640), (24, 832685), (28, 713730), (30, 666148), (35, 570984), (37, 540120), (40, 499611), (42, 475820), (56, 356865), (60, 333074), (70, 285492), (74, 270060), (84, 237910), (105, 190328), (111, 180040), (120, 166537), (140, 142746), (148, 135030), (168, 118955), (185, 108024), (210, 95164), (222, 90020), (259, 77160), (280, 71373), (296, 67515), (370, 54012), (420, 47582), (444, 45010), (518, 38580), (555, 36008), (643, 31080), (740, 27006), (777, 25720), (840, 23791), (888, 22505), (1036, 19290), (1110, 18004), (1286, 15540), (1295, 15432), (1480, 13503), (1554, 12860), (1929, 10360), (2072, 9645), (2220, 9002), (2572, 7770), (2590, 7716), (3108, 6430), (3215, 6216), (3858, 5180), (3885, 5144), (4440, 4501)]