21320057

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{4957}}^1$

素因数の和:5008

約数の個数: 16

約数和(自身を含む): 25702272

約数和(自身を除く): 4382215

約数列:

[1, 11, 17, 23, 187, 253, 391, 4301, 4957, 54527, 84269, 114011, 926959, 1254121, 1938187, 21320057]

約数ペア:

[(1, 21320057), (11, 1938187), (17, 1254121), (23, 926959), (187, 114011), (253, 84269), (391, 54527), (4301, 4957)]