21015960

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{197}}^1$

素因数の和:345

約数の個数: 128

約数和(自身を含む): 72990720

約数和(自身を除く): 51974760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 127, 140, 168, 197, 210, 254, 280, 381, 394, 420, 508, 591, 635, 762, 788, 840, 889, 985, 1016, 1182, 1270, 1379, 1524, 1576, 1778, 1905, 1970, 2364, 2540, 2667, 2758, 2955, 3048, 3556, 3810, 3940, 4137, 4445, 4728, 5080, 5334, 5516, 5910, 6895, 7112, 7620, 7880, 8274, 8890, 10668, 11032, 11820, 13335, 13790, 15240, 16548, 17780, 20685, 21336, 23640, 25019, 26670, 27580, 33096, 35560, 41370, 50038, 53340, 55160, 75057, 82740, 100076, 106680, 125095, 150114, 165480, 175133, 200152, 250190, 300228, 350266, 375285, 500380, 525399, 600456, 700532, 750570, 875665, 1000760, 1050798, 1401064, 1501140, 1751330, 2101596, 2626995, 3002280, 3502660, 4203192, 5253990, 7005320, 10507980, 21015960]

約数ペア:

[(1, 21015960), (2, 10507980), (3, 7005320), (4, 5253990), (5, 4203192), (6, 3502660), (7, 3002280), (8, 2626995), (10, 2101596), (12, 1751330), (14, 1501140), (15, 1401064), (20, 1050798), (21, 1000760), (24, 875665), (28, 750570), (30, 700532), (35, 600456), (40, 525399), (42, 500380), (56, 375285), (60, 350266), (70, 300228), (84, 250190), (105, 200152), (120, 175133), (127, 165480), (140, 150114), (168, 125095), (197, 106680), (210, 100076), (254, 82740), (280, 75057), (381, 55160), (394, 53340), (420, 50038), (508, 41370), (591, 35560), (635, 33096), (762, 27580), (788, 26670), (840, 25019), (889, 23640), (985, 21336), (1016, 20685), (1182, 17780), (1270, 16548), (1379, 15240), (1524, 13790), (1576, 13335), (1778, 11820), (1905, 11032), (1970, 10668), (2364, 8890), (2540, 8274), (2667, 7880), (2758, 7620), (2955, 7112), (3048, 6895), (3556, 5910), (3810, 5516), (3940, 5334), (4137, 5080), (4445, 4728)]