21404385

素因数分解:

$3^3\times 5^1\times {\mathrm{158551}}^1$

素因数の和:158565

約数の個数: 16

約数和(自身を含む): 38052480

約数和(自身を除く): 16648095

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 158551, 475653, 792755, 1426959, 2378265, 4280877, 7134795, 21404385]

約数ペア:

[(1, 21404385), (3, 7134795), (5, 4280877), (9, 2378265), (15, 1426959), (27, 792755), (45, 475653), (135, 158551)]