18201205

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 24883200

約数和(自身を除く): 6681995

約数列:

[1, 5, 11, 55, 59, 71, 79, 295, 355, 395, 649, 781, 869, 3245, 3905, 4189, 4345, 4661, 5609, 20945, 23305, 28045, 46079, 51271, 61699, 230395, 256355, 308495, 330931, 1654655, 3640241, 18201205]

約数ペア:

[(1, 18201205), (5, 3640241), (11, 1654655), (55, 330931), (59, 308495), (71, 256355), (79, 230395), (295, 61699), (355, 51271), (395, 46079), (649, 28045), (781, 23305), (869, 20945), (3245, 5609), (3905, 4661), (4189, 4345)]