20781480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:259

約数の個数: 128

約数和(自身を含む): 67495680

約数和(自身を除く): 46714200

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 30, 34, 40, 51, 60, 61, 68, 85, 102, 120, 122, 136, 167, 170, 183, 204, 244, 255, 305, 334, 340, 366, 408, 488, 501, 510, 610, 668, 680, 732, 835, 915, 1002, 1020, 1037, 1220, 1336, 1464, 1670, 1830, 2004, 2040, 2074, 2440, 2505, 2839, 3111, 3340, 3660, 4008, 4148, 5010, 5185, 5678, 6222, 6680, 7320, 8296, 8517, 10020, 10187, 10370, 11356, 12444, 14195, 15555, 17034, 20040, 20374, 20740, 22712, 24888, 28390, 30561, 31110, 34068, 40748, 41480, 42585, 50935, 56780, 61122, 62220, 68136, 81496, 85170, 101870, 113560, 122244, 124440, 152805, 170340, 173179, 203740, 244488, 305610, 340680, 346358, 407480, 519537, 611220, 692716, 865895, 1039074, 1222440, 1385432, 1731790, 2078148, 2597685, 3463580, 4156296, 5195370, 6927160, 10390740, 20781480]

約数ペア:

[(1, 20781480), (2, 10390740), (3, 6927160), (4, 5195370), (5, 4156296), (6, 3463580), (8, 2597685), (10, 2078148), (12, 1731790), (15, 1385432), (17, 1222440), (20, 1039074), (24, 865895), (30, 692716), (34, 611220), (40, 519537), (51, 407480), (60, 346358), (61, 340680), (68, 305610), (85, 244488), (102, 203740), (120, 173179), (122, 170340), (136, 152805), (167, 124440), (170, 122244), (183, 113560), (204, 101870), (244, 85170), (255, 81496), (305, 68136), (334, 62220), (340, 61122), (366, 56780), (408, 50935), (488, 42585), (501, 41480), (510, 40748), (610, 34068), (668, 31110), (680, 30561), (732, 28390), (835, 24888), (915, 22712), (1002, 20740), (1020, 20374), (1037, 20040), (1220, 17034), (1336, 15555), (1464, 14195), (1670, 12444), (1830, 11356), (2004, 10370), (2040, 10187), (2074, 10020), (2440, 8517), (2505, 8296), (2839, 7320), (3111, 6680), (3340, 6222), (3660, 5678), (4008, 5185), (4148, 5010)]