21000786786

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{4003}}^1\times {\mathrm{13879}}^1$

素因数の和:17900

約数の個数: 64

約数和(自身を含む): 53352499200

約数和(自身を除く): 32351712414

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378, 4003, 8006, 12009, 13879, 24018, 27758, 28021, 36027, 41637, 56042, 72054, 83274, 84063, 97153, 108081, 124911, 168126, 194306, 216162, 249822, 252189, 291459, 374733, 504378, 582918, 749466, 756567, 874377, 1513134, 1748754, 2623131, 5246262, 55557637, 111115274, 166672911, 333345822, 388903459, 500018733, 777806918, 1000037466, 1166710377, 1500056199, 2333420754, 3000112398, 3500131131, 7000262262, 10500393393, 21000786786]

約数ペア:

[(1, 21000786786), (2, 10500393393), (3, 7000262262), (6, 3500131131), (7, 3000112398), (9, 2333420754), (14, 1500056199), (18, 1166710377), (21, 1000037466), (27, 777806918), (42, 500018733), (54, 388903459), (63, 333345822), (126, 166672911), (189, 111115274), (378, 55557637), (4003, 5246262), (8006, 2623131), (12009, 1748754), (13879, 1513134), (24018, 874377), (27758, 756567), (28021, 749466), (36027, 582918), (41637, 504378), (56042, 374733), (72054, 291459), (83274, 252189), (84063, 249822), (97153, 216162), (108081, 194306), (124911, 168126)]