21868259

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{283}}^1$

素因数の和:399

約数の個数: 24

約数和(自身を含む): 27195840

約数和(自身を除く): 5327581

約数列:

[1, 7, 19, 49, 83, 133, 283, 581, 931, 1577, 1981, 4067, 5377, 11039, 13867, 23489, 37639, 77273, 164423, 263473, 446291, 1150961, 3124037, 21868259]

約数ペア:

[(1, 21868259), (7, 3124037), (19, 1150961), (49, 446291), (83, 263473), (133, 164423), (283, 77273), (581, 37639), (931, 23489), (1577, 13867), (1981, 11039), (4067, 5377)]