856508720

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{54347}}^1$

素因数の和:54557

約数の個数: 40

約数和(自身を含む): 2001528144

約数和(自身を除く): 1145019424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 7880, 15760, 54347, 108694, 217388, 271735, 434776, 543470, 869552, 1086940, 2173880, 4347760, 10706359, 21412718, 42825436, 53531795, 85650872, 107063590, 171301744, 214127180, 428254360, 856508720]

約数ペア:

[(1, 856508720), (2, 428254360), (4, 214127180), (5, 171301744), (8, 107063590), (10, 85650872), (16, 53531795), (20, 42825436), (40, 21412718), (80, 10706359), (197, 4347760), (394, 2173880), (788, 1086940), (985, 869552), (1576, 543470), (1970, 434776), (3152, 271735), (3940, 217388), (7880, 108694), (15760, 54347)]