7891820

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2003}}^1$

素因数の和:2209

約数の個数: 24

約数和(自身を含む): 16665264

約数和(自身を除く): 8773444

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 2003, 3940, 4006, 8012, 10015, 20030, 40060, 394591, 789182, 1578364, 1972955, 3945910, 7891820]

約数ペア:

[(1, 7891820), (2, 3945910), (4, 1972955), (5, 1578364), (10, 789182), (20, 394591), (197, 40060), (394, 20030), (788, 10015), (985, 8012), (1970, 4006), (2003, 3940)]