21211960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:197

約数の個数: 128

約数和(自身を含む): 60963840

約数和(自身を除く): 39751880

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 71, 77, 88, 97, 110, 140, 142, 154, 194, 220, 280, 284, 308, 355, 385, 388, 440, 485, 497, 568, 616, 679, 710, 770, 776, 781, 970, 994, 1067, 1358, 1420, 1540, 1562, 1940, 1988, 2134, 2485, 2716, 2840, 3080, 3124, 3395, 3880, 3905, 3976, 4268, 4970, 5335, 5432, 5467, 6248, 6790, 6887, 7469, 7810, 8536, 9940, 10670, 10934, 13580, 13774, 14938, 15620, 19880, 21340, 21868, 27160, 27335, 27548, 29876, 31240, 34435, 37345, 42680, 43736, 48209, 54670, 55096, 59752, 68870, 74690, 75757, 96418, 109340, 137740, 149380, 151514, 192836, 218680, 241045, 275480, 298760, 303028, 378785, 385672, 482090, 530299, 606056, 757570, 964180, 1060598, 1515140, 1928360, 2121196, 2651495, 3030280, 4242392, 5302990, 10605980, 21211960]

約数ペア:

[(1, 21211960), (2, 10605980), (4, 5302990), (5, 4242392), (7, 3030280), (8, 2651495), (10, 2121196), (11, 1928360), (14, 1515140), (20, 1060598), (22, 964180), (28, 757570), (35, 606056), (40, 530299), (44, 482090), (55, 385672), (56, 378785), (70, 303028), (71, 298760), (77, 275480), (88, 241045), (97, 218680), (110, 192836), (140, 151514), (142, 149380), (154, 137740), (194, 109340), (220, 96418), (280, 75757), (284, 74690), (308, 68870), (355, 59752), (385, 55096), (388, 54670), (440, 48209), (485, 43736), (497, 42680), (568, 37345), (616, 34435), (679, 31240), (710, 29876), (770, 27548), (776, 27335), (781, 27160), (970, 21868), (994, 21340), (1067, 19880), (1358, 15620), (1420, 14938), (1540, 13774), (1562, 13580), (1940, 10934), (1988, 10670), (2134, 9940), (2485, 8536), (2716, 7810), (2840, 7469), (3080, 6887), (3124, 6790), (3395, 6248), (3880, 5467), (3905, 5432), (3976, 5335), (4268, 4970)]