66720915

素因数分解:

$3^4\times 5^1\times {\mathrm{164743}}^1$

素因数の和:164760

約数の個数: 20

約数和(自身を含む): 119604144

約数和(自身を除く): 52883229

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 164743, 494229, 823715, 1482687, 2471145, 4448061, 7413435, 13344183, 22240305, 66720915]

約数ペア:

[(1, 66720915), (3, 22240305), (5, 13344183), (9, 7413435), (15, 4448061), (27, 2471145), (45, 1482687), (81, 823715), (135, 494229), (405, 164743)]