21366385

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{433}}^1$

素因数の和:648

約数の個数: 16

約数和(自身を含む): 26248320

約数和(自身を除く): 4881935

約数列:

[1, 5, 71, 139, 355, 433, 695, 2165, 9869, 30743, 49345, 60187, 153715, 300935, 4273277, 21366385]

約数ペア:

[(1, 21366385), (5, 4273277), (71, 300935), (139, 153715), (355, 60187), (433, 49345), (695, 30743), (2165, 9869)]