20389509

素因数分解:

$3^3\times 7^1\times {\mathrm{107881}}^1$

素因数の和:107897

約数の個数: 16

約数和(自身を含む): 34522240

約数和(自身を除く): 14132731

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 107881, 323643, 755167, 970929, 2265501, 2912787, 6796503, 20389509]

約数ペア:

[(1, 20389509), (3, 6796503), (7, 2912787), (9, 2265501), (21, 970929), (27, 755167), (63, 323643), (189, 107881)]