20805400

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{193}}^1$

素因数の和:234

約数の個数: 144

約数和(自身を含む): 61703640

約数和(自身を除く): 40898240

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 25, 28, 35, 40, 44, 49, 50, 55, 56, 70, 77, 88, 98, 100, 110, 140, 154, 175, 193, 196, 200, 220, 245, 275, 280, 308, 350, 385, 386, 392, 440, 490, 539, 550, 616, 700, 770, 772, 965, 980, 1078, 1100, 1225, 1351, 1400, 1540, 1544, 1925, 1930, 1960, 2123, 2156, 2200, 2450, 2695, 2702, 3080, 3850, 3860, 4246, 4312, 4825, 4900, 5390, 5404, 6755, 7700, 7720, 8492, 9457, 9650, 9800, 10615, 10780, 10808, 13475, 13510, 14861, 15400, 16984, 18914, 19300, 21230, 21560, 26950, 27020, 29722, 33775, 37828, 38600, 42460, 47285, 53075, 53900, 54040, 59444, 67550, 74305, 75656, 84920, 94570, 104027, 106150, 107800, 118888, 135100, 148610, 189140, 208054, 212300, 236425, 270200, 297220, 371525, 378280, 416108, 424600, 472850, 520135, 594440, 743050, 832216, 945700, 1040270, 1486100, 1891400, 2080540, 2600675, 2972200, 4161080, 5201350, 10402700, 20805400]

約数ペア:

[(1, 20805400), (2, 10402700), (4, 5201350), (5, 4161080), (7, 2972200), (8, 2600675), (10, 2080540), (11, 1891400), (14, 1486100), (20, 1040270), (22, 945700), (25, 832216), (28, 743050), (35, 594440), (40, 520135), (44, 472850), (49, 424600), (50, 416108), (55, 378280), (56, 371525), (70, 297220), (77, 270200), (88, 236425), (98, 212300), (100, 208054), (110, 189140), (140, 148610), (154, 135100), (175, 118888), (193, 107800), (196, 106150), (200, 104027), (220, 94570), (245, 84920), (275, 75656), (280, 74305), (308, 67550), (350, 59444), (385, 54040), (386, 53900), (392, 53075), (440, 47285), (490, 42460), (539, 38600), (550, 37828), (616, 33775), (700, 29722), (770, 27020), (772, 26950), (965, 21560), (980, 21230), (1078, 19300), (1100, 18914), (1225, 16984), (1351, 15400), (1400, 14861), (1540, 13510), (1544, 13475), (1925, 10808), (1930, 10780), (1960, 10615), (2123, 9800), (2156, 9650), (2200, 9457), (2450, 8492), (2695, 7720), (2702, 7700), (3080, 6755), (3850, 5404), (3860, 5390), (4246, 4900), (4312, 4825)]