20778981

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{2251}}^1$

素因数の和:2452

約数の個数: 16

約数和(自身を含む): 29510208

約数和(自身を除く): 8731227

約数列:

[1, 3, 17, 51, 181, 543, 2251, 3077, 6753, 9231, 38267, 114801, 407431, 1222293, 6926327, 20778981]

約数ペア:

[(1, 20778981), (3, 6926327), (17, 1222293), (51, 407431), (181, 114801), (543, 38267), (2251, 9231), (3077, 6753)]