18827809

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2687}}^1$

素因数の和:2725

約数の個数: 24

約数和(自身を含む): 25740288

約数和(自身を除く): 6912479

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 539, 637, 1001, 2687, 7007, 18809, 29557, 34931, 131663, 206899, 244517, 384241, 1448293, 1711619, 2689687, 18827809]

約数ペア:

[(1, 18827809), (7, 2689687), (11, 1711619), (13, 1448293), (49, 384241), (77, 244517), (91, 206899), (143, 131663), (539, 34931), (637, 29557), (1001, 18809), (2687, 7007)]