21119305

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{1451}}^1$

素因数の和:1568

約数の個数: 16

約数和(自身を含む): 26345088

約数和(自身を除く): 5225783

約数列:

[1, 5, 41, 71, 205, 355, 1451, 2911, 7255, 14555, 59491, 103021, 297455, 515105, 4223861, 21119305]

約数ペア:

[(1, 21119305), (5, 4223861), (41, 515105), (71, 297455), (205, 103021), (355, 59491), (1451, 14555), (2911, 7255)]