21037680

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{479}}^1$

素因数の和:559

約数の個数: 120

約数和(自身を含む): 71959680

約数和(自身を除く): 50922000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 61, 72, 80, 90, 120, 122, 144, 180, 183, 240, 244, 305, 360, 366, 479, 488, 549, 610, 720, 732, 915, 958, 976, 1098, 1220, 1437, 1464, 1830, 1916, 2196, 2395, 2440, 2745, 2874, 2928, 3660, 3832, 4311, 4392, 4790, 4880, 5490, 5748, 7185, 7320, 7664, 8622, 8784, 9580, 10980, 11496, 14370, 14640, 17244, 19160, 21555, 21960, 22992, 28740, 29219, 34488, 38320, 43110, 43920, 57480, 58438, 68976, 86220, 87657, 114960, 116876, 146095, 172440, 175314, 233752, 262971, 292190, 344880, 350628, 438285, 467504, 525942, 584380, 701256, 876570, 1051884, 1168760, 1314855, 1402512, 1753140, 2103768, 2337520, 2629710, 3506280, 4207536, 5259420, 7012560, 10518840, 21037680]

約数ペア:

[(1, 21037680), (2, 10518840), (3, 7012560), (4, 5259420), (5, 4207536), (6, 3506280), (8, 2629710), (9, 2337520), (10, 2103768), (12, 1753140), (15, 1402512), (16, 1314855), (18, 1168760), (20, 1051884), (24, 876570), (30, 701256), (36, 584380), (40, 525942), (45, 467504), (48, 438285), (60, 350628), (61, 344880), (72, 292190), (80, 262971), (90, 233752), (120, 175314), (122, 172440), (144, 146095), (180, 116876), (183, 114960), (240, 87657), (244, 86220), (305, 68976), (360, 58438), (366, 57480), (479, 43920), (488, 43110), (549, 38320), (610, 34488), (720, 29219), (732, 28740), (915, 22992), (958, 21960), (976, 21555), (1098, 19160), (1220, 17244), (1437, 14640), (1464, 14370), (1830, 11496), (1916, 10980), (2196, 9580), (2395, 8784), (2440, 8622), (2745, 7664), (2874, 7320), (2928, 7185), (3660, 5748), (3832, 5490), (4311, 4880), (4392, 4790)]