20291557

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{491}}^1$

素因数の和:549

約数の個数: 24

約数和(自身を含む): 25375392

約数和(自身を除く): 5083835

約数列:

[1, 11, 13, 17, 143, 187, 221, 289, 491, 2431, 3179, 3757, 5401, 6383, 8347, 41327, 70213, 91817, 108511, 141899, 1193621, 1560889, 1844687, 20291557]

約数ペア:

[(1, 20291557), (11, 1844687), (13, 1560889), (17, 1193621), (143, 141899), (187, 108511), (221, 91817), (289, 70213), (491, 41327), (2431, 8347), (3179, 6383), (3757, 5401)]