20405563

素因数分解:

${\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1\times {\mathrm{167}}^1$

素因数の和:354

約数の個数: 16

約数和(自身を含む): 22176000

約数和(自身を除く): 1770437

約数列:

[1, 19, 59, 109, 167, 1121, 2071, 3173, 6431, 9853, 18203, 122189, 187207, 345857, 1073977, 20405563]

約数ペア:

[(1, 20405563), (19, 1073977), (59, 345857), (109, 187207), (167, 122189), (1121, 18203), (2071, 9853), (3173, 6431)]