81405940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{52861}}^1$

素因数の和:52888

約数の個数: 48

約数和(自身を含む): 213139584

約数和(自身を除く): 131733644

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 52861, 105722, 211444, 264305, 370027, 528610, 581471, 740054, 1057220, 1162942, 1480108, 1850135, 2325884, 2907355, 3700270, 4070297, 5814710, 7400540, 8140594, 11629420, 16281188, 20351485, 40702970, 81405940]

約数ペア:

[(1, 81405940), (2, 40702970), (4, 20351485), (5, 16281188), (7, 11629420), (10, 8140594), (11, 7400540), (14, 5814710), (20, 4070297), (22, 3700270), (28, 2907355), (35, 2325884), (44, 1850135), (55, 1480108), (70, 1162942), (77, 1057220), (110, 740054), (140, 581471), (154, 528610), (220, 370027), (308, 264305), (385, 211444), (770, 105722), (1540, 52861)]