20997495

素因数分解:

$3^3\times 5^1\times {\mathrm{155537}}^1$

素因数の和:155551

約数の個数: 16

約数和(自身を含む): 37329120

約数和(自身を除く): 16331625

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155537, 466611, 777685, 1399833, 2333055, 4199499, 6999165, 20997495]

約数ペア:

[(1, 20997495), (3, 6999165), (5, 4199499), (9, 2333055), (15, 1399833), (27, 777685), (45, 466611), (135, 155537)]