20910555

素因数分解:

$3^4\times 5^1\times {\mathrm{51631}}^1$

素因数の和:51648

約数の個数: 20

約数和(自身を含む): 37484832

約数和(自身を除く): 16574277

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51631, 154893, 258155, 464679, 774465, 1394037, 2323395, 4182111, 6970185, 20910555]

約数ペア:

[(1, 20910555), (3, 6970185), (5, 4182111), (9, 2323395), (15, 1394037), (27, 774465), (45, 464679), (81, 258155), (135, 154893), (405, 51631)]