8490121960

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{321109}}^1$

素因数の和:321781

約数の個数: 32

約数和(自身を含む): 19131733800

約数和(自身を除く): 10641611840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 1322, 2644, 3305, 5288, 6610, 13220, 26440, 321109, 642218, 1284436, 1605545, 2568872, 3211090, 6422180, 12844360, 212253049, 424506098, 849012196, 1061265245, 1698024392, 2122530490, 4245060980, 8490121960]

約数ペア:

[(1, 8490121960), (2, 4245060980), (4, 2122530490), (5, 1698024392), (8, 1061265245), (10, 849012196), (20, 424506098), (40, 212253049), (661, 12844360), (1322, 6422180), (2644, 3211090), (3305, 2568872), (5288, 1605545), (6610, 1284436), (13220, 642218), (26440, 321109)]