21398487

素因数分解:

$3^1\times {\mathrm{11}}^3\times {\mathrm{23}}^1\times {\mathrm{233}}^1$

素因数の和:292

約数の個数: 32

約数和(自身を含む): 32887296

約数和(自身を除く): 11488809

約数列:

[1, 3, 11, 23, 33, 69, 121, 233, 253, 363, 699, 759, 1331, 2563, 2783, 3993, 5359, 7689, 8349, 16077, 28193, 30613, 58949, 84579, 91839, 176847, 310123, 648439, 930369, 1945317, 7132829, 21398487]

約数ペア:

[(1, 21398487), (3, 7132829), (11, 1945317), (23, 930369), (33, 648439), (69, 310123), (121, 176847), (233, 91839), (253, 84579), (363, 58949), (699, 30613), (759, 28193), (1331, 16077), (2563, 8349), (2783, 7689), (3993, 5359)]