18668979

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{8009}}^1$

素因数の和:8059

約数の個数: 24

約数和(自身を含む): 31655520

約数和(自身を除く): 12986541

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 8009, 24027, 56063, 72081, 168189, 296333, 504567, 888999, 2074331, 2666997, 6222993, 18668979]

約数ペア:

[(1, 18668979), (3, 6222993), (7, 2666997), (9, 2074331), (21, 888999), (37, 504567), (63, 296333), (111, 168189), (259, 72081), (333, 56063), (777, 24027), (2331, 8009)]