18985281

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^2\times {\mathrm{1709}}^1$

素因数の和:1765

約数の個数: 24

約数和(自身を含む): 30260160

約数和(自身を除く): 11274879

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 529, 1587, 1709, 3703, 5127, 11109, 11963, 35889, 39307, 117921, 275149, 825447, 904061, 2712183, 6328427, 18985281]

約数ペア:

[(1, 18985281), (3, 6328427), (7, 2712183), (21, 904061), (23, 825447), (69, 275149), (161, 117921), (483, 39307), (529, 35889), (1587, 11963), (1709, 11109), (3703, 5127)]