20408517

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{14821}}^1$

素因数の和:14850

約数の個数: 20

約数和(自身を含む): 32282316

約数和(自身を除く): 11873799

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 14821, 44463, 133389, 251957, 400167, 755871, 1200501, 2267613, 6802839, 20408517]

約数ペア:

[(1, 20408517), (3, 6802839), (9, 2267613), (17, 1200501), (27, 755871), (51, 400167), (81, 251957), (153, 133389), (459, 44463), (1377, 14821)]