21170840

素因数分解:

$2^3\times 5^1\times {\mathrm{529271}}^1$

素因数の和:529282

約数の個数: 16

約数和(自身を含む): 47634480

約数和(自身を除く): 26463640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 529271, 1058542, 2117084, 2646355, 4234168, 5292710, 10585420, 21170840]

約数ペア:

[(1, 21170840), (2, 10585420), (4, 5292710), (5, 4234168), (8, 2646355), (10, 2117084), (20, 1058542), (40, 529271)]