18719757

素因数分解:

$3^2\times 7^1\times {\mathrm{107}}^1\times {\mathrm{2777}}^1$

素因数の和:2897

約数の個数: 24

約数和(自身を含む): 31202496

約数和(自身を除く): 12482739

約数列:

[1, 3, 7, 9, 21, 63, 107, 321, 749, 963, 2247, 2777, 6741, 8331, 19439, 24993, 58317, 174951, 297139, 891417, 2079973, 2674251, 6239919, 18719757]

約数ペア:

[(1, 18719757), (3, 6239919), (7, 2674251), (9, 2079973), (21, 891417), (63, 297139), (107, 174951), (321, 58317), (749, 24993), (963, 19439), (2247, 8331), (2777, 6741)]