81406591

素因数分解:

$7^3\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{607}}^1$

素因数の和:668

約数の個数: 32

約数和(自身を含む): 105062400

約数和(自身を除く): 23655809

約数列:

[1, 7, 17, 23, 49, 119, 161, 343, 391, 607, 833, 1127, 2737, 4249, 5831, 7889, 10319, 13961, 19159, 29743, 72233, 97727, 134113, 208201, 237337, 505631, 684089, 1661359, 3539417, 4788623, 11629513, 81406591]

約数ペア:

[(1, 81406591), (7, 11629513), (17, 4788623), (23, 3539417), (49, 1661359), (119, 684089), (161, 505631), (343, 237337), (391, 208201), (607, 134113), (833, 97727), (1127, 72233), (2737, 29743), (4249, 19159), (5831, 13961), (7889, 10319)]