20890415

素因数分解:

$5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{937}}^1$

素因数の和:976

約数の個数: 32

約数和(自身を含む): 31516800

約数和(自身を除く): 10626385

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 343, 455, 637, 937, 1715, 3185, 4459, 4685, 6559, 12181, 22295, 32795, 45913, 60905, 85267, 229565, 321391, 426335, 596869, 1606955, 2984345, 4178083, 20890415]

約数ペア:

[(1, 20890415), (5, 4178083), (7, 2984345), (13, 1606955), (35, 596869), (49, 426335), (65, 321391), (91, 229565), (245, 85267), (343, 60905), (455, 45913), (637, 32795), (937, 22295), (1715, 12181), (3185, 6559), (4459, 4685)]