20746880

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{421}}^1$

素因数の和:458

約数の個数: 128

約数和(自身を含む): 61983360

約数和(自身を除く): 41236480

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 64, 70, 77, 80, 88, 110, 112, 128, 140, 154, 160, 176, 220, 224, 280, 308, 320, 352, 385, 421, 440, 448, 560, 616, 640, 704, 770, 842, 880, 896, 1120, 1232, 1408, 1540, 1684, 1760, 2105, 2240, 2464, 2947, 3080, 3368, 3520, 4210, 4480, 4631, 4928, 5894, 6160, 6736, 7040, 8420, 9262, 9856, 11788, 12320, 13472, 14735, 16840, 18524, 23155, 23576, 24640, 26944, 29470, 32417, 33680, 37048, 46310, 47152, 49280, 53888, 58940, 64834, 67360, 74096, 92620, 94304, 117880, 129668, 134720, 148192, 162085, 185240, 188608, 235760, 259336, 269440, 296384, 324170, 370480, 377216, 471520, 518672, 592768, 648340, 740960, 943040, 1037344, 1296680, 1481920, 1886080, 2074688, 2593360, 2963840, 4149376, 5186720, 10373440, 20746880]

約数ペア:

[(1, 20746880), (2, 10373440), (4, 5186720), (5, 4149376), (7, 2963840), (8, 2593360), (10, 2074688), (11, 1886080), (14, 1481920), (16, 1296680), (20, 1037344), (22, 943040), (28, 740960), (32, 648340), (35, 592768), (40, 518672), (44, 471520), (55, 377216), (56, 370480), (64, 324170), (70, 296384), (77, 269440), (80, 259336), (88, 235760), (110, 188608), (112, 185240), (128, 162085), (140, 148192), (154, 134720), (160, 129668), (176, 117880), (220, 94304), (224, 92620), (280, 74096), (308, 67360), (320, 64834), (352, 58940), (385, 53888), (421, 49280), (440, 47152), (448, 46310), (560, 37048), (616, 33680), (640, 32417), (704, 29470), (770, 26944), (842, 24640), (880, 23576), (896, 23155), (1120, 18524), (1232, 16840), (1408, 14735), (1540, 13472), (1684, 12320), (1760, 11788), (2105, 9856), (2240, 9262), (2464, 8420), (2947, 7040), (3080, 6736), (3368, 6160), (3520, 5894), (4210, 4928), (4480, 4631)]