21465213

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2161}}^1$

素因数の和:2225

約数の個数: 32

約数和(自身を含む): 36529152

約数和(自身を除く): 15063939

約数列:

[1, 3, 7, 11, 21, 33, 43, 77, 129, 231, 301, 473, 903, 1419, 2161, 3311, 6483, 9933, 15127, 23771, 45381, 71313, 92923, 166397, 278769, 499191, 650461, 1022153, 1951383, 3066459, 7155071, 21465213]

約数ペア:

[(1, 21465213), (3, 7155071), (7, 3066459), (11, 1951383), (21, 1022153), (33, 650461), (43, 499191), (77, 278769), (129, 166397), (231, 92923), (301, 71313), (473, 45381), (903, 23771), (1419, 15127), (2161, 9933), (3311, 6483)]