1440980

素因数分解:

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

素因数の和:779

約数の個数: 24

約数和(自身を含む): 3058440

約数和(自身を除く): 1617460

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 661, 1090, 1322, 2180, 2644, 3305, 6610, 13220, 72049, 144098, 288196, 360245, 720490, 1440980]

約数ペア:

[(1, 1440980), (2, 720490), (4, 360245), (5, 288196), (10, 144098), (20, 72049), (109, 13220), (218, 6610), (436, 3305), (545, 2644), (661, 2180), (1090, 1322)]