21000279748

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1\times {\mathrm{45337}}^1$

素因数の和:45652

約数の個数: 48

約数和(自身を含む): 42775858944

約数和(自身を除く): 21775579196

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 233, 284, 466, 497, 932, 994, 1631, 1988, 3262, 6524, 16543, 33086, 45337, 66172, 90674, 115801, 181348, 231602, 317359, 463204, 634718, 1269436, 3218927, 6437854, 10563521, 12875708, 21127042, 22532489, 42254084, 45064978, 73944647, 90129956, 147889294, 295778588, 750009991, 1500019982, 3000039964, 5250069937, 10500139874, 21000279748]

約数ペア:

[(1, 21000279748), (2, 10500139874), (4, 5250069937), (7, 3000039964), (14, 1500019982), (28, 750009991), (71, 295778588), (142, 147889294), (233, 90129956), (284, 73944647), (466, 45064978), (497, 42254084), (932, 22532489), (994, 21127042), (1631, 12875708), (1988, 10563521), (3262, 6437854), (6524, 3218927), (16543, 1269436), (33086, 634718), (45337, 463204), (66172, 317359), (90674, 231602), (115801, 181348)]