278825729

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{8933}}^1$

素因数の和:8974

約数の個数: 20

約数和(自身を含む): 350337876

約数和(自身を除く): 71512147

約数列:

[1, 7, 13, 49, 91, 343, 637, 2401, 4459, 8933, 31213, 62531, 116129, 437717, 812903, 3064019, 5690321, 21448133, 39832247, 278825729]

約数ペア:

[(1, 278825729), (7, 39832247), (13, 21448133), (49, 5690321), (91, 3064019), (343, 812903), (637, 437717), (2401, 116129), (4459, 62531), (8933, 31213)]