21123726

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{2531}}^1$

素因数の和:2656

約数の個数: 32

約数和(自身を含む): 45940608

約数和(自身を除く): 24816882

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 107, 214, 321, 642, 1391, 2531, 2782, 4173, 5062, 7593, 8346, 15186, 32903, 65806, 98709, 197418, 270817, 541634, 812451, 1624902, 3520621, 7041242, 10561863, 21123726]

約数ペア:

[(1, 21123726), (2, 10561863), (3, 7041242), (6, 3520621), (13, 1624902), (26, 812451), (39, 541634), (78, 270817), (107, 197418), (214, 98709), (321, 65806), (642, 32903), (1391, 15186), (2531, 8346), (2782, 7593), (4173, 5062)]