19902993

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{4339}}^1$

素因数の和:4492

約数の個数: 16

約数和(自身を含む): 29164800

約数和(自身を除く): 9261807

約数列:

[1, 3, 11, 33, 139, 417, 1529, 4339, 4587, 13017, 47729, 143187, 603121, 1809363, 6634331, 19902993]

約数ペア:

[(1, 19902993), (3, 6634331), (11, 1809363), (33, 603121), (139, 143187), (417, 47729), (1529, 13017), (4339, 4587)]