20994795

素因数分解:

$3^4\times 5^1\times {\mathrm{51839}}^1$

素因数の和:51856

約数の個数: 20

約数和(自身を含む): 37635840

約数和(自身を除く): 16641045

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51839, 155517, 259195, 466551, 777585, 1399653, 2332755, 4198959, 6998265, 20994795]

約数ペア:

[(1, 20994795), (3, 6998265), (5, 4198959), (9, 2332755), (15, 1399653), (27, 777585), (45, 466551), (81, 259195), (135, 155517), (405, 51839)]