20744880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:199

約数の個数: 160

約数和(自身を含む): 71037120

約数和(自身を除く): 50292240

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 39, 40, 48, 52, 60, 61, 65, 78, 80, 104, 109, 120, 122, 130, 156, 183, 195, 208, 218, 240, 244, 260, 305, 312, 327, 366, 390, 436, 488, 520, 545, 610, 624, 654, 732, 780, 793, 872, 915, 976, 1040, 1090, 1220, 1308, 1417, 1464, 1560, 1586, 1635, 1744, 1830, 2180, 2379, 2440, 2616, 2834, 2928, 3120, 3172, 3270, 3660, 3965, 4251, 4360, 4758, 4880, 5232, 5668, 6344, 6540, 6649, 7085, 7320, 7930, 8502, 8720, 9516, 11336, 11895, 12688, 13080, 13298, 14170, 14640, 15860, 17004, 19032, 19947, 21255, 22672, 23790, 26160, 26596, 28340, 31720, 33245, 34008, 38064, 39894, 42510, 47580, 53192, 56680, 63440, 66490, 68016, 79788, 85020, 86437, 95160, 99735, 106384, 113360, 132980, 159576, 170040, 172874, 190320, 199470, 259311, 265960, 319152, 340080, 345748, 398940, 432185, 518622, 531920, 691496, 797880, 864370, 1037244, 1296555, 1382992, 1595760, 1728740, 2074488, 2593110, 3457480, 4148976, 5186220, 6914960, 10372440, 20744880]

約数ペア:

[(1, 20744880), (2, 10372440), (3, 6914960), (4, 5186220), (5, 4148976), (6, 3457480), (8, 2593110), (10, 2074488), (12, 1728740), (13, 1595760), (15, 1382992), (16, 1296555), (20, 1037244), (24, 864370), (26, 797880), (30, 691496), (39, 531920), (40, 518622), (48, 432185), (52, 398940), (60, 345748), (61, 340080), (65, 319152), (78, 265960), (80, 259311), (104, 199470), (109, 190320), (120, 172874), (122, 170040), (130, 159576), (156, 132980), (183, 113360), (195, 106384), (208, 99735), (218, 95160), (240, 86437), (244, 85020), (260, 79788), (305, 68016), (312, 66490), (327, 63440), (366, 56680), (390, 53192), (436, 47580), (488, 42510), (520, 39894), (545, 38064), (610, 34008), (624, 33245), (654, 31720), (732, 28340), (780, 26596), (793, 26160), (872, 23790), (915, 22672), (976, 21255), (1040, 19947), (1090, 19032), (1220, 17004), (1308, 15860), (1417, 14640), (1464, 14170), (1560, 13298), (1586, 13080), (1635, 12688), (1744, 11895), (1830, 11336), (2180, 9516), (2379, 8720), (2440, 8502), (2616, 7930), (2834, 7320), (2928, 7085), (3120, 6649), (3172, 6540), (3270, 6344), (3660, 5668), (3965, 5232), (4251, 4880), (4360, 4758)]