21979328

素因数分解:

$2^6\times 7^1\times {\mathrm{71}}^1\times {\mathrm{691}}^1$

素因数の和:781

約数の個数: 56

約数和(自身を含む): 50621184

約数和(自身を除く): 28641856

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 71, 112, 142, 224, 284, 448, 497, 568, 691, 994, 1136, 1382, 1988, 2272, 2764, 3976, 4544, 4837, 5528, 7952, 9674, 11056, 15904, 19348, 22112, 31808, 38696, 44224, 49061, 77392, 98122, 154784, 196244, 309568, 343427, 392488, 686854, 784976, 1373708, 1569952, 2747416, 3139904, 5494832, 10989664, 21979328]

約数ペア:

[(1, 21979328), (2, 10989664), (4, 5494832), (7, 3139904), (8, 2747416), (14, 1569952), (16, 1373708), (28, 784976), (32, 686854), (56, 392488), (64, 343427), (71, 309568), (112, 196244), (142, 154784), (224, 98122), (284, 77392), (448, 49061), (497, 44224), (568, 38696), (691, 31808), (994, 22112), (1136, 19348), (1382, 15904), (1988, 11056), (2272, 9674), (2764, 7952), (3976, 5528), (4544, 4837)]