21380458904

素因数分解:

$2^3\times 7^2\times {\mathrm{71}}^1\times {\mathrm{768197}}^1$

素因数の和:768288

約数の個数: 48

約数和(自身を含む): 47290268880

約数和(自身を除く): 25909809976

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 71, 98, 142, 196, 284, 392, 497, 568, 994, 1988, 3479, 3976, 6958, 13916, 27832, 768197, 1536394, 3072788, 5377379, 6145576, 10754758, 21509516, 37641653, 43019032, 54541987, 75283306, 109083974, 150566612, 218167948, 301133224, 381793909, 436335896, 763587818, 1527175636, 2672557363, 3054351272, 5345114726, 10690229452, 21380458904]

約数ペア:

[(1, 21380458904), (2, 10690229452), (4, 5345114726), (7, 3054351272), (8, 2672557363), (14, 1527175636), (28, 763587818), (49, 436335896), (56, 381793909), (71, 301133224), (98, 218167948), (142, 150566612), (196, 109083974), (284, 75283306), (392, 54541987), (497, 43019032), (568, 37641653), (994, 21509516), (1988, 10754758), (3479, 6145576), (3976, 5377379), (6958, 3072788), (13916, 1536394), (27832, 768197)]