19911339

素因数分解:

$3^4\times 7^1\times {\mathrm{35117}}^1$

素因数の和:35136

約数の個数: 20

約数和(自身を含む): 33994224

約数和(自身を除く): 14082885

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 35117, 105351, 245819, 316053, 737457, 948159, 2212371, 2844477, 6637113, 19911339]

約数ペア:

[(1, 19911339), (3, 6637113), (7, 2844477), (9, 2212371), (21, 948159), (27, 737457), (63, 316053), (81, 245819), (189, 105351), (567, 35117)]