2881960

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{661}}^1$

素因数の和:781

約数の個数: 32

約数和(自身を含む): 6553800

約数和(自身を除く): 3671840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 661, 872, 1090, 1322, 2180, 2644, 3305, 4360, 5288, 6610, 13220, 26440, 72049, 144098, 288196, 360245, 576392, 720490, 1440980, 2881960]

約数ペア:

[(1, 2881960), (2, 1440980), (4, 720490), (5, 576392), (8, 360245), (10, 288196), (20, 144098), (40, 72049), (109, 26440), (218, 13220), (436, 6610), (545, 5288), (661, 4360), (872, 3305), (1090, 2644), (1322, 2180)]