21000724745

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4195949}}^1$

素因数の和:4195985

約数の個数: 32

約数和(自身を含む): 33836140800

約数和(自身を除く): 12835416055

約数列:

[1, 5, 7, 11, 13, 35, 55, 65, 77, 91, 143, 385, 455, 715, 1001, 5005, 4195949, 20979745, 29371643, 46155439, 54547337, 146858215, 230777195, 272736685, 323088073, 381831359, 600020707, 1615440365, 1909156795, 3000103535, 4200144949, 21000724745]

約数ペア:

[(1, 21000724745), (5, 4200144949), (7, 3000103535), (11, 1909156795), (13, 1615440365), (35, 600020707), (55, 381831359), (65, 323088073), (77, 272736685), (91, 230777195), (143, 146858215), (385, 54547337), (455, 46155439), (715, 29371643), (1001, 20979745), (5005, 4195949)]