20561553

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{269}}^1$

素因数の和:446

約数の個数: 32

約数和(自身を含む): 32400000

約数和(自身を除く): 11838447

約数列:

[1, 3, 9, 19, 27, 57, 149, 171, 269, 447, 513, 807, 1341, 2421, 2831, 4023, 5111, 7263, 8493, 15333, 25479, 40081, 45999, 76437, 120243, 137997, 360729, 761539, 1082187, 2284617, 6853851, 20561553]

約数ペア:

[(1, 20561553), (3, 6853851), (9, 2284617), (19, 1082187), (27, 761539), (57, 360729), (149, 137997), (171, 120243), (269, 76437), (447, 45999), (513, 40081), (807, 25479), (1341, 15333), (2421, 8493), (2831, 7263), (4023, 5111)]