20428485

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{769}}^1$

素因数の和:818

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 22149435

約数列:

[1, 3, 5, 7, 11, 15, 21, 23, 33, 35, 55, 69, 77, 105, 115, 161, 165, 231, 253, 345, 385, 483, 759, 769, 805, 1155, 1265, 1771, 2307, 2415, 3795, 3845, 5313, 5383, 8459, 8855, 11535, 16149, 17687, 25377, 26565, 26915, 42295, 53061, 59213, 80745, 88435, 123809, 126885, 177639, 194557, 265305, 296065, 371427, 583671, 619045, 888195, 972785, 1361899, 1857135, 2918355, 4085697, 6809495, 20428485]

約数ペア:

[(1, 20428485), (3, 6809495), (5, 4085697), (7, 2918355), (11, 1857135), (15, 1361899), (21, 972785), (23, 888195), (33, 619045), (35, 583671), (55, 371427), (69, 296065), (77, 265305), (105, 194557), (115, 177639), (161, 126885), (165, 123809), (231, 88435), (253, 80745), (345, 59213), (385, 53061), (483, 42295), (759, 26915), (769, 26565), (805, 25377), (1155, 17687), (1265, 16149), (1771, 11535), (2307, 8855), (2415, 8459), (3795, 5383), (3845, 5313)]