18420857

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{5471}}^1$

素因数の和:5528

約数の個数: 16

約数和(自身を含む): 23288832

約数和(自身を除く): 4867975

約数列:

[1, 7, 13, 37, 91, 259, 481, 3367, 5471, 38297, 71123, 202427, 497861, 1416989, 2631551, 18420857]

約数ペア:

[(1, 18420857), (7, 2631551), (13, 1416989), (37, 497861), (91, 202427), (259, 71123), (481, 38297), (3367, 5471)]