18990416

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{10889}}^1$

素因数の和:11006

約数の個数: 20

約数和(自身を含む): 37134900

約数和(自身を除く): 18144484

約数列:

[1, 2, 4, 8, 16, 109, 218, 436, 872, 1744, 10889, 21778, 43556, 87112, 174224, 1186901, 2373802, 4747604, 9495208, 18990416]

約数ペア:

[(1, 18990416), (2, 9495208), (4, 4747604), (8, 2373802), (16, 1186901), (109, 174224), (218, 87112), (436, 43556), (872, 21778), (1744, 10889)]