21971719

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{433}}^1\times {\mathrm{659}}^1$

素因数の和:1110

約数の個数: 16

約数和(自身を含む): 27498240

約数和(自身を除く): 5526521

約数列:

[1, 7, 11, 77, 433, 659, 3031, 4613, 4763, 7249, 33341, 50743, 285347, 1997429, 3138817, 21971719]

約数ペア:

[(1, 21971719), (7, 3138817), (11, 1997429), (77, 285347), (433, 50743), (659, 33341), (3031, 7249), (4613, 4763)]