21747340

素因数分解:

$2^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4231}}^1$

素因数の和:4497

約数の個数: 24

約数和(自身を含む): 45857952

約数和(自身を除く): 24110612

約数列:

[1, 2, 4, 5, 10, 20, 257, 514, 1028, 1285, 2570, 4231, 5140, 8462, 16924, 21155, 42310, 84620, 1087367, 2174734, 4349468, 5436835, 10873670, 21747340]

約数ペア:

[(1, 21747340), (2, 10873670), (4, 5436835), (5, 4349468), (10, 2174734), (20, 1087367), (257, 84620), (514, 42310), (1028, 21155), (1285, 16924), (2570, 8462), (4231, 5140)]