198768661

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{643}}^1$

素因数の和:785

約数の個数: 32

約数和(自身を含む): 253890560

約数和(自身を除く): 55121899

約数列:

[1, 7, 13, 43, 79, 91, 301, 553, 559, 643, 1027, 3397, 3913, 4501, 7189, 8359, 23779, 27649, 44161, 50797, 58513, 193543, 309127, 355579, 359437, 660361, 2184271, 2516059, 4622527, 15289897, 28395523, 198768661]

約数ペア:

[(1, 198768661), (7, 28395523), (13, 15289897), (43, 4622527), (79, 2516059), (91, 2184271), (301, 660361), (553, 359437), (559, 355579), (643, 309127), (1027, 193543), (3397, 58513), (3913, 50797), (4501, 44161), (7189, 27649), (8359, 23779)]