18886761

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{1319}}^1$

素因数の和:1405

約数の個数: 24

約数和(自身を含む): 28691520

約数和(自身を除く): 9804759

約数列:

[1, 3, 9, 37, 43, 111, 129, 333, 387, 1319, 1591, 3957, 4773, 11871, 14319, 48803, 56717, 146409, 170151, 439227, 510453, 2098529, 6295587, 18886761]

約数ペア:

[(1, 18886761), (3, 6295587), (9, 2098529), (37, 510453), (43, 439227), (111, 170151), (129, 146409), (333, 56717), (387, 48803), (1319, 14319), (1591, 11871), (3957, 4773)]