20871120

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:257

約数の個数: 160

約数和(自身を含む): 71424000

約数和(自身を除く): 50552880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 19, 20, 23, 24, 30, 38, 40, 46, 48, 57, 60, 69, 76, 80, 92, 95, 114, 115, 120, 138, 152, 184, 190, 199, 228, 230, 240, 276, 285, 304, 345, 368, 380, 398, 437, 456, 460, 552, 570, 597, 690, 760, 796, 874, 912, 920, 995, 1104, 1140, 1194, 1311, 1380, 1520, 1592, 1748, 1840, 1990, 2185, 2280, 2388, 2622, 2760, 2985, 3184, 3496, 3781, 3980, 4370, 4560, 4577, 4776, 5244, 5520, 5970, 6555, 6992, 7562, 7960, 8740, 9154, 9552, 10488, 11343, 11940, 13110, 13731, 15124, 15920, 17480, 18308, 18905, 20976, 22686, 22885, 23880, 26220, 27462, 30248, 34960, 36616, 37810, 45372, 45770, 47760, 52440, 54924, 56715, 60496, 68655, 73232, 75620, 86963, 90744, 91540, 104880, 109848, 113430, 137310, 151240, 173926, 181488, 183080, 219696, 226860, 260889, 274620, 302480, 347852, 366160, 434815, 453720, 521778, 549240, 695704, 869630, 907440, 1043556, 1098480, 1304445, 1391408, 1739260, 2087112, 2608890, 3478520, 4174224, 5217780, 6957040, 10435560, 20871120]

約数ペア:

[(1, 20871120), (2, 10435560), (3, 6957040), (4, 5217780), (5, 4174224), (6, 3478520), (8, 2608890), (10, 2087112), (12, 1739260), (15, 1391408), (16, 1304445), (19, 1098480), (20, 1043556), (23, 907440), (24, 869630), (30, 695704), (38, 549240), (40, 521778), (46, 453720), (48, 434815), (57, 366160), (60, 347852), (69, 302480), (76, 274620), (80, 260889), (92, 226860), (95, 219696), (114, 183080), (115, 181488), (120, 173926), (138, 151240), (152, 137310), (184, 113430), (190, 109848), (199, 104880), (228, 91540), (230, 90744), (240, 86963), (276, 75620), (285, 73232), (304, 68655), (345, 60496), (368, 56715), (380, 54924), (398, 52440), (437, 47760), (456, 45770), (460, 45372), (552, 37810), (570, 36616), (597, 34960), (690, 30248), (760, 27462), (796, 26220), (874, 23880), (912, 22885), (920, 22686), (995, 20976), (1104, 18905), (1140, 18308), (1194, 17480), (1311, 15920), (1380, 15124), (1520, 13731), (1592, 13110), (1748, 11940), (1840, 11343), (1990, 10488), (2185, 9552), (2280, 9154), (2388, 8740), (2622, 7960), (2760, 7562), (2985, 6992), (3184, 6555), (3496, 5970), (3781, 5520), (3980, 5244), (4370, 4776), (4560, 4577)]