19965880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45377}}^1$

素因数の和:45399

約数の個数: 32

約数和(自身を含む): 49008240

約数和(自身を除く): 29042360

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45377, 90754, 181508, 226885, 363016, 453770, 499147, 907540, 998294, 1815080, 1996588, 2495735, 3993176, 4991470, 9982940, 19965880]

約数ペア:

[(1, 19965880), (2, 9982940), (4, 4991470), (5, 3993176), (8, 2495735), (10, 1996588), (11, 1815080), (20, 998294), (22, 907540), (40, 499147), (44, 453770), (55, 363016), (88, 226885), (110, 181508), (220, 90754), (440, 45377)]