81958513

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1709}}^1$

素因数の和:1777

約数の個数: 32

約数和(自身を含む): 110315520

約数和(自身を除く): 28357007

約数列:

[1, 7, 13, 17, 31, 91, 119, 217, 221, 403, 527, 1547, 1709, 2821, 3689, 6851, 11963, 22217, 29053, 47957, 52979, 155519, 203371, 370853, 377689, 688727, 900643, 2643823, 4821089, 6304501, 11708359, 81958513]

約数ペア:

[(1, 81958513), (7, 11708359), (13, 6304501), (17, 4821089), (31, 2643823), (91, 900643), (119, 688727), (217, 377689), (221, 370853), (403, 203371), (527, 155519), (1547, 52979), (1709, 47957), (2821, 29053), (3689, 22217), (6851, 11963)]