208721981

素因数分解:

${\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{1607}}^1$

素因数の和:1820

約数の個数: 16

約数和(自身を含む): 229442304

約数和(自身を除く): 20720323

約数列:

[1, 13, 97, 103, 1261, 1339, 1607, 9991, 20891, 129883, 155879, 165521, 2026427, 2151773, 16055537, 208721981]

約数ペア:

[(1, 208721981), (13, 16055537), (97, 2151773), (103, 2026427), (1261, 165521), (1339, 155879), (1607, 129883), (9991, 20891)]