81389035

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{178877}}^1$

素因数の和:178902

約数の個数: 16

約数和(自身を含む): 120206016

約数和(自身を除く): 38816981

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 178877, 894385, 1252139, 2325401, 6260695, 11627005, 16277807, 81389035]

約数ペア:

[(1, 81389035), (5, 16277807), (7, 11627005), (13, 6260695), (35, 2325401), (65, 1252139), (91, 894385), (455, 178877)]