21061997

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:193

約数の個数: 32

約数和(自身を含む): 26127360

約数和(自身を除く): 5065363

約数列:

[1, 11, 17, 23, 59, 83, 187, 253, 391, 649, 913, 1003, 1357, 1411, 1909, 4301, 4897, 11033, 14927, 15521, 20999, 23069, 32453, 53867, 83249, 112631, 253759, 356983, 915739, 1238941, 1914727, 21061997]

約数ペア:

[(1, 21061997), (11, 1914727), (17, 1238941), (23, 915739), (59, 356983), (83, 253759), (187, 112631), (253, 83249), (391, 53867), (649, 32453), (913, 23069), (1003, 20999), (1357, 15521), (1411, 14927), (1909, 11033), (4301, 4897)]