21255080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:199

約数の個数: 128

約数和(自身を含む): 61102080

約数和(自身を除く): 39847000

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 67, 70, 77, 88, 103, 110, 134, 140, 154, 206, 220, 268, 280, 308, 335, 385, 412, 440, 469, 515, 536, 616, 670, 721, 737, 770, 824, 938, 1030, 1133, 1340, 1442, 1474, 1540, 1876, 2060, 2266, 2345, 2680, 2884, 2948, 3080, 3605, 3685, 3752, 4120, 4532, 4690, 5159, 5665, 5768, 5896, 6901, 7210, 7370, 7931, 9064, 9380, 10318, 11330, 13802, 14420, 14740, 15862, 18760, 20636, 22660, 25795, 27604, 28840, 29480, 31724, 34505, 39655, 41272, 45320, 48307, 51590, 55208, 63448, 69010, 75911, 79310, 96614, 103180, 138020, 151822, 158620, 193228, 206360, 241535, 276040, 303644, 317240, 379555, 386456, 483070, 531377, 607288, 759110, 966140, 1062754, 1518220, 1932280, 2125508, 2656885, 3036440, 4251016, 5313770, 10627540, 21255080]

約数ペア:

[(1, 21255080), (2, 10627540), (4, 5313770), (5, 4251016), (7, 3036440), (8, 2656885), (10, 2125508), (11, 1932280), (14, 1518220), (20, 1062754), (22, 966140), (28, 759110), (35, 607288), (40, 531377), (44, 483070), (55, 386456), (56, 379555), (67, 317240), (70, 303644), (77, 276040), (88, 241535), (103, 206360), (110, 193228), (134, 158620), (140, 151822), (154, 138020), (206, 103180), (220, 96614), (268, 79310), (280, 75911), (308, 69010), (335, 63448), (385, 55208), (412, 51590), (440, 48307), (469, 45320), (515, 41272), (536, 39655), (616, 34505), (670, 31724), (721, 29480), (737, 28840), (770, 27604), (824, 25795), (938, 22660), (1030, 20636), (1133, 18760), (1340, 15862), (1442, 14740), (1474, 14420), (1540, 13802), (1876, 11330), (2060, 10318), (2266, 9380), (2345, 9064), (2680, 7931), (2884, 7370), (2948, 7210), (3080, 6901), (3605, 5896), (3685, 5768), (3752, 5665), (4120, 5159), (4532, 4690)]