19995859

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{523}}^1$

素因数の和:726

約数の個数: 16

約数和(自身を含む): 22976352

約数和(自身を除く): 2980493

約数列:

[1, 13, 17, 173, 221, 523, 2249, 2941, 6799, 8891, 38233, 90479, 115583, 1176227, 1538143, 19995859]

約数ペア:

[(1, 19995859), (13, 1538143), (17, 1176227), (173, 115583), (221, 90479), (523, 38233), (2249, 8891), (2941, 6799)]