21640047

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{691}}^1$

素因数の和:791

約数の個数: 32

約数和(自身を含む): 34411776

約数和(自身を除く): 12771729

約数列:

[1, 3, 11, 13, 33, 39, 73, 143, 219, 429, 691, 803, 949, 2073, 2409, 2847, 7601, 8983, 10439, 22803, 26949, 31317, 50443, 98813, 151329, 296439, 554873, 655759, 1664619, 1967277, 7213349, 21640047]

約数ペア:

[(1, 21640047), (3, 7213349), (11, 1967277), (13, 1664619), (33, 655759), (39, 554873), (73, 296439), (143, 151329), (219, 98813), (429, 50443), (691, 31317), (803, 26949), (949, 22803), (2073, 10439), (2409, 8983), (2847, 7601)]