21019271

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{7451}}^1$

素因数の和:7502

約数の個数: 16

約数和(自身を含む): 26707968

約数和(自身を除く): 5688697

約数列:

[1, 7, 13, 31, 91, 217, 403, 2821, 7451, 52157, 96863, 230981, 678041, 1616867, 3002753, 21019271]

約数ペア:

[(1, 21019271), (7, 3002753), (13, 1616867), (31, 678041), (91, 230981), (217, 96863), (403, 52157), (2821, 7451)]