19985497

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{991}}^1$

素因数の和:1108

約数の個数: 16

約数和(自身を含む): 23744512

約数和(自身を除く): 3759015

約数列:

[1, 7, 43, 67, 301, 469, 991, 2881, 6937, 20167, 42613, 66397, 298291, 464779, 2855071, 19985497]

約数ペア:

[(1, 19985497), (7, 2855071), (43, 464779), (67, 298291), (301, 66397), (469, 42613), (991, 20167), (2881, 6937)]