19720755

素因数分解:

$3^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4339}}^1$

素因数の和:4451

約数の個数: 24

約数和(自身を含む): 34529040

約数和(自身を除く): 14808285

約数列:

[1, 3, 5, 9, 15, 45, 101, 303, 505, 909, 1515, 4339, 4545, 13017, 21695, 39051, 65085, 195255, 438239, 1314717, 2191195, 3944151, 6573585, 19720755]

約数ペア:

[(1, 19720755), (3, 6573585), (5, 3944151), (9, 2191195), (15, 1314717), (45, 438239), (101, 195255), (303, 65085), (505, 39051), (909, 21695), (1515, 13017), (4339, 4545)]