20978760

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{691}}^1$

素因数の和:739

約数の個数: 128

約数和(自身を含む): 71746560

約数和(自身を除く): 50767800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 23, 24, 30, 33, 40, 44, 46, 55, 60, 66, 69, 88, 92, 110, 115, 120, 132, 138, 165, 184, 220, 230, 253, 264, 276, 330, 345, 440, 460, 506, 552, 660, 690, 691, 759, 920, 1012, 1265, 1320, 1380, 1382, 1518, 2024, 2073, 2530, 2760, 2764, 3036, 3455, 3795, 4146, 5060, 5528, 6072, 6910, 7590, 7601, 8292, 10120, 10365, 13820, 15180, 15202, 15893, 16584, 20730, 22803, 27640, 30360, 30404, 31786, 38005, 41460, 45606, 47679, 60808, 63572, 76010, 79465, 82920, 91212, 95358, 114015, 127144, 152020, 158930, 174823, 182424, 190716, 228030, 238395, 304040, 317860, 349646, 381432, 456060, 476790, 524469, 635720, 699292, 874115, 912120, 953580, 1048938, 1398584, 1748230, 1907160, 2097876, 2622345, 3496460, 4195752, 5244690, 6992920, 10489380, 20978760]

約数ペア:

[(1, 20978760), (2, 10489380), (3, 6992920), (4, 5244690), (5, 4195752), (6, 3496460), (8, 2622345), (10, 2097876), (11, 1907160), (12, 1748230), (15, 1398584), (20, 1048938), (22, 953580), (23, 912120), (24, 874115), (30, 699292), (33, 635720), (40, 524469), (44, 476790), (46, 456060), (55, 381432), (60, 349646), (66, 317860), (69, 304040), (88, 238395), (92, 228030), (110, 190716), (115, 182424), (120, 174823), (132, 158930), (138, 152020), (165, 127144), (184, 114015), (220, 95358), (230, 91212), (253, 82920), (264, 79465), (276, 76010), (330, 63572), (345, 60808), (440, 47679), (460, 45606), (506, 41460), (552, 38005), (660, 31786), (690, 30404), (691, 30360), (759, 27640), (920, 22803), (1012, 20730), (1265, 16584), (1320, 15893), (1380, 15202), (1382, 15180), (1518, 13820), (2024, 10365), (2073, 10120), (2530, 8292), (2760, 7601), (2764, 7590), (3036, 6910), (3455, 6072), (3795, 5528), (4146, 5060)]