19871440

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1787}}^1$

素因数の和:1939

約数の個数: 40

約数和(自身を含む): 46559520

約数和(自身を除く): 26688080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 1787, 2224, 2780, 3574, 5560, 7148, 8935, 11120, 14296, 17870, 28592, 35740, 71480, 142960, 248393, 496786, 993572, 1241965, 1987144, 2483930, 3974288, 4967860, 9935720, 19871440]

約数ペア:

[(1, 19871440), (2, 9935720), (4, 4967860), (5, 3974288), (8, 2483930), (10, 1987144), (16, 1241965), (20, 993572), (40, 496786), (80, 248393), (139, 142960), (278, 71480), (556, 35740), (695, 28592), (1112, 17870), (1390, 14296), (1787, 11120), (2224, 8935), (2780, 7148), (3574, 5560)]