20287820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{263}}^1$

素因数の和:327

約数の個数: 96

約数和(自身を含む): 53222400

約数和(自身を除く): 32934580

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 29, 35, 38, 58, 70, 76, 95, 116, 133, 140, 145, 190, 203, 263, 266, 290, 380, 406, 526, 532, 551, 580, 665, 812, 1015, 1052, 1102, 1315, 1330, 1841, 2030, 2204, 2630, 2660, 2755, 3682, 3857, 4060, 4997, 5260, 5510, 7364, 7627, 7714, 9205, 9994, 11020, 15254, 15428, 18410, 19285, 19988, 24985, 30508, 34979, 36820, 38135, 38570, 49970, 53389, 69958, 76270, 77140, 99940, 106778, 139916, 144913, 152540, 174895, 213556, 266945, 289826, 349790, 533890, 579652, 699580, 724565, 1014391, 1067780, 1449130, 2028782, 2898260, 4057564, 5071955, 10143910, 20287820]

約数ペア:

[(1, 20287820), (2, 10143910), (4, 5071955), (5, 4057564), (7, 2898260), (10, 2028782), (14, 1449130), (19, 1067780), (20, 1014391), (28, 724565), (29, 699580), (35, 579652), (38, 533890), (58, 349790), (70, 289826), (76, 266945), (95, 213556), (116, 174895), (133, 152540), (140, 144913), (145, 139916), (190, 106778), (203, 99940), (263, 77140), (266, 76270), (290, 69958), (380, 53389), (406, 49970), (526, 38570), (532, 38135), (551, 36820), (580, 34979), (665, 30508), (812, 24985), (1015, 19988), (1052, 19285), (1102, 18410), (1315, 15428), (1330, 15254), (1841, 11020), (2030, 9994), (2204, 9205), (2630, 7714), (2660, 7627), (2755, 7364), (3682, 5510), (3857, 5260), (4060, 4997)]