20978907

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{1907}}^1$

素因数の和:2122

約数の個数: 16

約数和(自身を含む): 29612160

約数和(自身を除く): 8633253

約数列:

[1, 3, 19, 57, 193, 579, 1907, 3667, 5721, 11001, 36233, 108699, 368051, 1104153, 6992969, 20978907]

約数ペア:

[(1, 20978907), (3, 6992969), (19, 1104153), (57, 368051), (193, 108699), (579, 36233), (1907, 11001), (3667, 5721)]