21894580

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{5557}}^1$

素因数の和:5763

約数の個数: 24

約数和(自身を含む): 46220328

約数和(自身を除く): 24325748

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 788, 985, 1970, 3940, 5557, 11114, 22228, 27785, 55570, 111140, 1094729, 2189458, 4378916, 5473645, 10947290, 21894580]

約数ペア:

[(1, 21894580), (2, 10947290), (4, 5473645), (5, 4378916), (10, 2189458), (20, 1094729), (197, 111140), (394, 55570), (788, 27785), (985, 22228), (1970, 11114), (3940, 5557)]