20600778860

素因数分解:

$2^2\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{518389}}^1$

素因数の和:520385

約数の個数: 24

約数和(自身を含む): 43283491440

約数和(自身を除く): 22682712580

約数列:

[1, 2, 4, 5, 10, 20, 1987, 3974, 7948, 9935, 19870, 39740, 518389, 1036778, 2073556, 2591945, 5183890, 10367780, 1030038943, 2060077886, 4120155772, 5150194715, 10300389430, 20600778860]

約数ペア:

[(1, 20600778860), (2, 10300389430), (4, 5150194715), (5, 4120155772), (10, 2060077886), (20, 1030038943), (1987, 10367780), (3974, 5183890), (7948, 2591945), (9935, 2073556), (19870, 1036778), (39740, 518389)]