21130540

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4111}}^1$

素因数の和:4377

約数の個数: 24

約数和(自身を含む): 44557632

約数和(自身を除く): 23427092

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4111, 5140, 8222, 16444, 20555, 41110, 82220, 1056527, 2113054, 4226108, 5282635, 10565270, 21130540]

約数ペア:

[(1, 21130540), (2, 10565270), (4, 5282635), (5, 4226108), (10, 2113054), (20, 1056527), (257, 82220), (514, 41110), (1028, 20555), (1285, 16444), (2570, 8222), (4111, 5140)]