123456440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71777}}^1$

素因数の和:71831

約数の個数: 32

約数和(自身を含む): 284240880

約数和(自身を除く): 160784440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 71777, 143554, 287108, 358885, 574216, 717770, 1435540, 2871080, 3086411, 6172822, 12345644, 15432055, 24691288, 30864110, 61728220, 123456440]

約数ペア:

[(1, 123456440), (2, 61728220), (4, 30864110), (5, 24691288), (8, 15432055), (10, 12345644), (20, 6172822), (40, 3086411), (43, 2871080), (86, 1435540), (172, 717770), (215, 574216), (344, 358885), (430, 287108), (860, 143554), (1720, 71777)]