19870840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45161}}^1$

素因数の和:45183

約数の個数: 32

約数和(自身を含む): 48774960

約数和(自身を除く): 28904120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45161, 90322, 180644, 225805, 361288, 451610, 496771, 903220, 993542, 1806440, 1987084, 2483855, 3974168, 4967710, 9935420, 19870840]

約数ペア:

[(1, 19870840), (2, 9935420), (4, 4967710), (5, 3974168), (8, 2483855), (10, 1987084), (11, 1806440), (20, 993542), (22, 903220), (40, 496771), (44, 451610), (55, 361288), (88, 225805), (110, 180644), (220, 90322), (440, 45161)]