255555

素因数分解:

$3^4\times 5^1\times {\mathrm{631}}^1$

素因数の和:648

約数の個数: 20

約数和(自身を含む): 458832

約数和(自身を除く): 203277

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 631, 1893, 3155, 5679, 9465, 17037, 28395, 51111, 85185, 255555]

約数ペア:

[(1, 255555), (3, 85185), (5, 51111), (9, 28395), (15, 17037), (27, 9465), (45, 5679), (81, 3155), (135, 1893), (405, 631)]