19765552

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{28729}}^1$

素因数の和:28780

約数の個数: 20

約数和(自身を含む): 39187720

約数和(自身を除く): 19422168

約数列:

[1, 2, 4, 8, 16, 43, 86, 172, 344, 688, 28729, 57458, 114916, 229832, 459664, 1235347, 2470694, 4941388, 9882776, 19765552]

約数ペア:

[(1, 19765552), (2, 9882776), (4, 4941388), (8, 2470694), (16, 1235347), (43, 459664), (86, 229832), (172, 114916), (344, 57458), (688, 28729)]