20765517

素因数分解:

$3^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{557}}^1$

素因数の和:637

約数の個数: 24

約数和(自身を含む): 30149856

約数和(自身を除く): 9384339

約数列:

[1, 3, 17, 43, 51, 129, 289, 557, 731, 867, 1671, 2193, 9469, 12427, 23951, 28407, 37281, 71853, 160973, 407167, 482919, 1221501, 6921839, 20765517]

約数ペア:

[(1, 20765517), (3, 6921839), (17, 1221501), (43, 482919), (51, 407167), (129, 160973), (289, 71853), (557, 37281), (731, 28407), (867, 23951), (1671, 12427), (2193, 9469)]