21628659

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:267

約数の個数: 32

約数和(自身を含む): 32223744

約数和(自身を除く): 10595085

約数列:

[1, 3, 13, 39, 71, 73, 107, 213, 219, 321, 923, 949, 1391, 2769, 2847, 4173, 5183, 7597, 7811, 15549, 22791, 23433, 67379, 98761, 101543, 202137, 296283, 304629, 554581, 1663743, 7209553, 21628659]

約数ペア:

[(1, 21628659), (3, 7209553), (13, 1663743), (39, 554581), (71, 304629), (73, 296283), (107, 202137), (213, 101543), (219, 98761), (321, 67379), (923, 23433), (949, 22791), (1391, 15549), (2769, 7811), (2847, 7597), (4173, 5183)]