21491332

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{317}}^1\times {\mathrm{997}}^1$

素因数の和:1335

約数の個数: 24

約数和(自身を含む): 39987864

約数和(自身を除く): 18496532

約数列:

[1, 2, 4, 17, 34, 68, 317, 634, 997, 1268, 1994, 3988, 5389, 10778, 16949, 21556, 33898, 67796, 316049, 632098, 1264196, 5372833, 10745666, 21491332]

約数ペア:

[(1, 21491332), (2, 10745666), (4, 5372833), (17, 1264196), (34, 632098), (68, 316049), (317, 67796), (634, 33898), (997, 21556), (1268, 16949), (1994, 10778), (3988, 5389)]