21519124

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{173}}^1\times {\mathrm{257}}^1$

素因数の和:456

約数の個数: 36

約数和(自身を含む): 41794452

約数和(自身を除く): 20275328

約数列:

[1, 2, 4, 11, 22, 44, 121, 173, 242, 257, 346, 484, 514, 692, 1028, 1903, 2827, 3806, 5654, 7612, 11308, 20933, 31097, 41866, 44461, 62194, 83732, 88922, 124388, 177844, 489071, 978142, 1956284, 5379781, 10759562, 21519124]

約数ペア:

[(1, 21519124), (2, 10759562), (4, 5379781), (11, 1956284), (22, 978142), (44, 489071), (121, 177844), (173, 124388), (242, 88922), (257, 83732), (346, 62194), (484, 44461), (514, 41866), (692, 31097), (1028, 20933), (1903, 11308), (2827, 7612), (3806, 5654)]