21297776

素因数分解:

$2^4\times {\mathrm{199}}^1\times {\mathrm{6689}}^1$

素因数の和:6896

約数の個数: 20

約数和(自身を含む): 41478000

約数和(自身を除く): 20180224

約数列:

[1, 2, 4, 8, 16, 199, 398, 796, 1592, 3184, 6689, 13378, 26756, 53512, 107024, 1331111, 2662222, 5324444, 10648888, 21297776]

約数ペア:

[(1, 21297776), (2, 10648888), (4, 5324444), (8, 2662222), (16, 1331111), (199, 107024), (398, 53512), (796, 26756), (1592, 13378), (3184, 6689)]