20868289

素因数分解:

${\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:209

約数の個数: 24

約数和(自身を含む): 24390240

約数和(自身を除く): 3521951

約数列:

[1, 13, 19, 67, 97, 169, 247, 871, 1261, 1273, 1843, 3211, 6499, 11323, 16393, 16549, 23959, 84487, 123481, 215137, 311467, 1098331, 1605253, 20868289]

約数ペア:

[(1, 20868289), (13, 1605253), (19, 1098331), (67, 311467), (97, 215137), (169, 123481), (247, 84487), (871, 23959), (1261, 16549), (1273, 16393), (1843, 11323), (3211, 6499)]