18970025

素因数分解:

$5^2\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 24373440

約数和(自身を除く): 5403415

約数列:

[1, 5, 25, 53, 103, 139, 265, 515, 695, 1325, 2575, 3475, 5459, 7367, 14317, 27295, 36835, 71585, 136475, 184175, 357925, 758801, 3794005, 18970025]

約数ペア:

[(1, 18970025), (5, 3794005), (25, 758801), (53, 357925), (103, 184175), (139, 136475), (265, 71585), (515, 36835), (695, 27295), (1325, 14317), (2575, 7367), (3475, 5459)]