12891280

素因数分解:

$2^4\times 5^1\times {\mathrm{161141}}^1$

素因数の和:161154

約数の個数: 20

約数和(自身を含む): 29972412

約数和(自身を除く): 17081132

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 161141, 322282, 644564, 805705, 1289128, 1611410, 2578256, 3222820, 6445640, 12891280]

約数ペア:

[(1, 12891280), (2, 6445640), (4, 3222820), (5, 2578256), (8, 1611410), (10, 1289128), (16, 805705), (20, 644564), (40, 322282), (80, 161141)]