18721839

素因数分解:

$3^1\times {\mathrm{23}}^2\times {\mathrm{47}}^1\times {\mathrm{251}}^1$

素因数の和:347

約数の個数: 24

約数和(自身を含む): 26756352

約数和(自身を除く): 8034513

約数列:

[1, 3, 23, 47, 69, 141, 251, 529, 753, 1081, 1587, 3243, 5773, 11797, 17319, 24863, 35391, 74589, 132779, 271331, 398337, 813993, 6240613, 18721839]

約数ペア:

[(1, 18721839), (3, 6240613), (23, 813993), (47, 398337), (69, 271331), (141, 132779), (251, 74589), (529, 35391), (753, 24863), (1081, 17319), (1587, 11797), (3243, 5773)]