21138.000000

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{797}}^1$

素因数の和:848

約数の個数: 20

約数和(自身を含む): 1088472

約数和(自身を除く): 540136

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 797, 1594, 3188, 6376, 12752, 34271, 68542, 137084, 274168, 548336]

約数ペア:

[(1, 548336), (2, 274168), (4, 137084), (8, 68542), (16, 34271), (43, 12752), (86, 6376), (172, 3188), (344, 1594), (688, 797)]