20721861

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{167}}^1\times {\mathrm{811}}^1$

素因数の和:1001

約数の個数: 24

約数和(自身を含む): 31921344

約数和(自身を除く): 11199483

約数列:

[1, 3, 9, 17, 51, 153, 167, 501, 811, 1503, 2433, 2839, 7299, 8517, 13787, 25551, 41361, 124083, 135437, 406311, 1218933, 2302429, 6907287, 20721861]

約数ペア:

[(1, 20721861), (3, 6907287), (9, 2302429), (17, 1218933), (51, 406311), (153, 135437), (167, 124083), (501, 41361), (811, 25551), (1503, 13787), (2433, 8517), (2839, 7299)]