21171480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{373}}^1$

素因数の和:441

約数の個数: 128

約数和(自身を含む): 71089920

約数和(自身を除く): 49918440

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 43, 44, 55, 60, 66, 86, 88, 110, 120, 129, 132, 165, 172, 215, 220, 258, 264, 330, 344, 373, 430, 440, 473, 516, 645, 660, 746, 860, 946, 1032, 1119, 1290, 1320, 1419, 1492, 1720, 1865, 1892, 2238, 2365, 2580, 2838, 2984, 3730, 3784, 4103, 4476, 4730, 5160, 5595, 5676, 7095, 7460, 8206, 8952, 9460, 11190, 11352, 12309, 14190, 14920, 16039, 16412, 18920, 20515, 22380, 24618, 28380, 32078, 32824, 41030, 44760, 48117, 49236, 56760, 61545, 64156, 80195, 82060, 96234, 98472, 123090, 128312, 160390, 164120, 176429, 192468, 240585, 246180, 320780, 352858, 384936, 481170, 492360, 529287, 641560, 705716, 882145, 962340, 1058574, 1411432, 1764290, 1924680, 2117148, 2646435, 3528580, 4234296, 5292870, 7057160, 10585740, 21171480]

約数ペア:

[(1, 21171480), (2, 10585740), (3, 7057160), (4, 5292870), (5, 4234296), (6, 3528580), (8, 2646435), (10, 2117148), (11, 1924680), (12, 1764290), (15, 1411432), (20, 1058574), (22, 962340), (24, 882145), (30, 705716), (33, 641560), (40, 529287), (43, 492360), (44, 481170), (55, 384936), (60, 352858), (66, 320780), (86, 246180), (88, 240585), (110, 192468), (120, 176429), (129, 164120), (132, 160390), (165, 128312), (172, 123090), (215, 98472), (220, 96234), (258, 82060), (264, 80195), (330, 64156), (344, 61545), (373, 56760), (430, 49236), (440, 48117), (473, 44760), (516, 41030), (645, 32824), (660, 32078), (746, 28380), (860, 24618), (946, 22380), (1032, 20515), (1119, 18920), (1290, 16412), (1320, 16039), (1419, 14920), (1492, 14190), (1720, 12309), (1865, 11352), (1892, 11190), (2238, 9460), (2365, 8952), (2580, 8206), (2838, 7460), (2984, 7095), (3730, 5676), (3784, 5595), (4103, 5160), (4476, 4730)]