21209553

素因数分解:

$3^3\times {\mathrm{809}}^1\times {\mathrm{971}}^1$

素因数の和:1789

約数の個数: 16

約数和(自身を含む): 31492800

約数和(自身を除く): 10283247

約数列:

[1, 3, 9, 27, 809, 971, 2427, 2913, 7281, 8739, 21843, 26217, 785539, 2356617, 7069851, 21209553]

約数ペア:

[(1, 21209553), (3, 7069851), (9, 2356617), (27, 785539), (809, 26217), (971, 21843), (2427, 8739), (2913, 7281)]