81130819

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{21503}}^1$

素因数の和:21535

約数の個数: 16

約数和(自身を含む): 103219200

約数和(自身を除く): 22088381

約数列:

[1, 7, 11, 49, 77, 343, 539, 3773, 21503, 150521, 236533, 1053647, 1655731, 7375529, 11590117, 81130819]

約数ペア:

[(1, 81130819), (7, 11590117), (11, 7375529), (49, 1655731), (77, 1053647), (343, 236533), (539, 150521), (3773, 21503)]