20351513

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{743}}^1$

素因数の和:813

約数の個数: 24

約数和(自身を含む): 26123328

約数和(自身を除く): 5771815

約数列:

[1, 7, 13, 43, 49, 91, 301, 559, 637, 743, 2107, 3913, 5201, 9659, 27391, 31949, 36407, 67613, 223643, 415337, 473291, 1565501, 2907359, 20351513]

約数ペア:

[(1, 20351513), (7, 2907359), (13, 1565501), (43, 473291), (49, 415337), (91, 223643), (301, 67613), (559, 36407), (637, 31949), (743, 27391), (2107, 9659), (3913, 5201)]