21156993

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{967}}^1$

素因数の和:1014

約数の個数: 48

約数和(自身を含む): 38054016

約数和(自身を除く): 16897023

約数列:

[1, 3, 9, 11, 13, 17, 33, 39, 51, 99, 117, 143, 153, 187, 221, 429, 561, 663, 967, 1287, 1683, 1989, 2431, 2901, 7293, 8703, 10637, 12571, 16439, 21879, 31911, 37713, 49317, 95733, 113139, 138281, 147951, 180829, 213707, 414843, 542487, 641121, 1244529, 1627461, 1923363, 2350777, 7052331, 21156993]

約数ペア:

[(1, 21156993), (3, 7052331), (9, 2350777), (11, 1923363), (13, 1627461), (17, 1244529), (33, 641121), (39, 542487), (51, 414843), (99, 213707), (117, 180829), (143, 147951), (153, 138281), (187, 113139), (221, 95733), (429, 49317), (561, 37713), (663, 31911), (967, 21879), (1287, 16439), (1683, 12571), (1989, 10637), (2431, 8703), (2901, 7293)]