20990706

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{881}}^1$

素因数の和:935

約数の個数: 48

約数和(自身を含む): 48390048

約数和(自身を除く): 27399342

約数列:

[1, 2, 3, 6, 11, 19, 22, 33, 38, 57, 66, 114, 209, 361, 418, 627, 722, 881, 1083, 1254, 1762, 2166, 2643, 3971, 5286, 7942, 9691, 11913, 16739, 19382, 23826, 29073, 33478, 50217, 58146, 100434, 184129, 318041, 368258, 552387, 636082, 954123, 1104774, 1908246, 3498451, 6996902, 10495353, 20990706]

約数ペア:

[(1, 20990706), (2, 10495353), (3, 6996902), (6, 3498451), (11, 1908246), (19, 1104774), (22, 954123), (33, 636082), (38, 552387), (57, 368258), (66, 318041), (114, 184129), (209, 100434), (361, 58146), (418, 50217), (627, 33478), (722, 29073), (881, 23826), (1083, 19382), (1254, 16739), (1762, 11913), (2166, 9691), (2643, 7942), (3971, 5286)]