19790540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:279

約数の個数: 96

約数和(自身を含む): 52835328

約数和(自身を除く): 33044788

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 71, 77, 110, 140, 142, 154, 181, 220, 284, 308, 355, 362, 385, 497, 710, 724, 770, 781, 905, 994, 1267, 1420, 1540, 1562, 1810, 1988, 1991, 2485, 2534, 3124, 3620, 3905, 3982, 4970, 5068, 5467, 6335, 7810, 7964, 9940, 9955, 10934, 12670, 12851, 13937, 15620, 19910, 21868, 25340, 25702, 27335, 27874, 39820, 51404, 54670, 55748, 64255, 69685, 89957, 109340, 128510, 139370, 141361, 179914, 257020, 278740, 282722, 359828, 449785, 565444, 706805, 899570, 989527, 1413610, 1799140, 1979054, 2827220, 3958108, 4947635, 9895270, 19790540]

約数ペア:

[(1, 19790540), (2, 9895270), (4, 4947635), (5, 3958108), (7, 2827220), (10, 1979054), (11, 1799140), (14, 1413610), (20, 989527), (22, 899570), (28, 706805), (35, 565444), (44, 449785), (55, 359828), (70, 282722), (71, 278740), (77, 257020), (110, 179914), (140, 141361), (142, 139370), (154, 128510), (181, 109340), (220, 89957), (284, 69685), (308, 64255), (355, 55748), (362, 54670), (385, 51404), (497, 39820), (710, 27874), (724, 27335), (770, 25702), (781, 25340), (905, 21868), (994, 19910), (1267, 15620), (1420, 13937), (1540, 12851), (1562, 12670), (1810, 10934), (1988, 9955), (1991, 9940), (2485, 7964), (2534, 7810), (3124, 6335), (3620, 5467), (3905, 5068), (3982, 4970)]