18696587

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{599}}^1$

素因数の和:640

約数の個数: 20

約数和(自身を含む): 23528400

約数和(自身を除く): 4831813

約数列:

[1, 7, 13, 49, 91, 343, 599, 637, 2401, 4193, 4459, 7787, 29351, 31213, 54509, 205457, 381563, 1438199, 2670941, 18696587]

約数ペア:

[(1, 18696587), (7, 2670941), (13, 1438199), (49, 381563), (91, 205457), (343, 54509), (599, 31213), (637, 29351), (2401, 7787), (4193, 4459)]