81400319

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{11617}}^1$

素因数の和:11655

約数の個数: 24

約数和(自身を含む): 111253968

約数和(自身を除く): 29853649

約数列:

[1, 7, 11, 13, 49, 77, 91, 143, 539, 637, 1001, 7007, 11617, 81319, 127787, 151021, 569233, 894509, 1057147, 1661231, 6261563, 7400029, 11628617, 81400319]

約数ペア:

[(1, 81400319), (7, 11628617), (11, 7400029), (13, 6261563), (49, 1661231), (77, 1057147), (91, 894509), (143, 569233), (539, 151021), (637, 127787), (1001, 81319), (7007, 11617)]