20127289

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1663}}^1$

素因数の和:1709

約数の個数: 24

約数和(自身を含む): 26557440

約数和(自身を除く): 6430151

約数列:

[1, 7, 13, 19, 49, 91, 133, 247, 637, 931, 1663, 1729, 11641, 12103, 21619, 31597, 81487, 151333, 221179, 410761, 1059331, 1548253, 2875327, 20127289]

約数ペア:

[(1, 20127289), (7, 2875327), (13, 1548253), (19, 1059331), (49, 410761), (91, 221179), (133, 151333), (247, 81487), (637, 31597), (931, 21619), (1663, 12103), (1729, 11641)]