19886720

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{193}}^1$

素因数の和:242

約数の個数: 128

約数和(自身を含む): 56989440

約数和(自身を除く): 37102720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 64, 70, 80, 92, 112, 115, 128, 140, 160, 161, 184, 193, 224, 230, 280, 320, 322, 368, 386, 448, 460, 560, 640, 644, 736, 772, 805, 896, 920, 965, 1120, 1288, 1351, 1472, 1544, 1610, 1840, 1930, 2240, 2576, 2702, 2944, 3088, 3220, 3680, 3860, 4439, 4480, 5152, 5404, 6176, 6440, 6755, 7360, 7720, 8878, 10304, 10808, 12352, 12880, 13510, 14720, 15440, 17756, 20608, 21616, 22195, 24704, 25760, 27020, 30880, 31073, 35512, 43232, 44390, 51520, 54040, 61760, 62146, 71024, 86464, 88780, 103040, 108080, 123520, 124292, 142048, 155365, 172928, 177560, 216160, 248584, 284096, 310730, 355120, 432320, 497168, 568192, 621460, 710240, 864640, 994336, 1242920, 1420480, 1988672, 2485840, 2840960, 3977344, 4971680, 9943360, 19886720]

約数ペア:

[(1, 19886720), (2, 9943360), (4, 4971680), (5, 3977344), (7, 2840960), (8, 2485840), (10, 1988672), (14, 1420480), (16, 1242920), (20, 994336), (23, 864640), (28, 710240), (32, 621460), (35, 568192), (40, 497168), (46, 432320), (56, 355120), (64, 310730), (70, 284096), (80, 248584), (92, 216160), (112, 177560), (115, 172928), (128, 155365), (140, 142048), (160, 124292), (161, 123520), (184, 108080), (193, 103040), (224, 88780), (230, 86464), (280, 71024), (320, 62146), (322, 61760), (368, 54040), (386, 51520), (448, 44390), (460, 43232), (560, 35512), (640, 31073), (644, 30880), (736, 27020), (772, 25760), (805, 24704), (896, 22195), (920, 21616), (965, 20608), (1120, 17756), (1288, 15440), (1351, 14720), (1472, 13510), (1544, 12880), (1610, 12352), (1840, 10808), (1930, 10304), (2240, 8878), (2576, 7720), (2702, 7360), (2944, 6755), (3088, 6440), (3220, 6176), (3680, 5404), (3860, 5152), (4439, 4480)]