21253708

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{10691}}^1$

素因数の和:10773

約数の個数: 24

約数和(自身を含む): 43110144

約数和(自身を除く): 21856436

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988, 10691, 21382, 42764, 74837, 149674, 299348, 759061, 1518122, 3036244, 5313427, 10626854, 21253708]

約数ペア:

[(1, 21253708), (2, 10626854), (4, 5313427), (7, 3036244), (14, 1518122), (28, 759061), (71, 299348), (142, 149674), (284, 74837), (497, 42764), (994, 21382), (1988, 10691)]