78887660

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{36187}}^1$

素因数の和:36305

約数の個数: 24

約数和(自身を含む): 167188560

約数和(自身を除く): 88300900

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 36187, 72374, 144748, 180935, 361870, 723740, 3944383, 7888766, 15777532, 19721915, 39443830, 78887660]

約数ペア:

[(1, 78887660), (2, 39443830), (4, 19721915), (5, 15777532), (10, 7888766), (20, 3944383), (109, 723740), (218, 361870), (436, 180935), (545, 144748), (1090, 72374), (2180, 36187)]