19911957

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{13799}}^1$

素因数の和:13852

約数の個数: 16

約数和(自身を含む): 29366400

約数和(自身を除く): 9454443

約数列:

[1, 3, 13, 37, 39, 111, 481, 1443, 13799, 41397, 179387, 510563, 538161, 1531689, 6637319, 19911957]

約数ペア:

[(1, 19911957), (3, 6637319), (13, 1531689), (37, 538161), (39, 510563), (111, 179387), (481, 41397), (1443, 13799)]