17719989

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:617

約数の個数: 32

約数和(自身を含む): 28800000

約数和(自身を除く): 11080011

約数列:

[1, 3, 7, 19, 21, 57, 89, 133, 267, 399, 499, 623, 1497, 1691, 1869, 3493, 5073, 9481, 10479, 11837, 28443, 35511, 44411, 66367, 133233, 199101, 310877, 843809, 932631, 2531427, 5906663, 17719989]

約数ペア:

[(1, 17719989), (3, 5906663), (7, 2531427), (19, 932631), (21, 843809), (57, 310877), (89, 199101), (133, 133233), (267, 66367), (399, 44411), (499, 35511), (623, 28443), (1497, 11837), (1691, 10479), (1869, 9481), (3493, 5073)]