21538328

素因数分解:

$2^3\times 7^1\times {\mathrm{139}}^1\times {\mathrm{2767}}^1$

素因数の和:2919

約数の個数: 32

約数和(自身を含む): 46502400

約数和(自身を除く): 24964072

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 139, 278, 556, 973, 1112, 1946, 2767, 3892, 5534, 7784, 11068, 19369, 22136, 38738, 77476, 154952, 384613, 769226, 1538452, 2692291, 3076904, 5384582, 10769164, 21538328]

約数ペア:

[(1, 21538328), (2, 10769164), (4, 5384582), (7, 3076904), (8, 2692291), (14, 1538452), (28, 769226), (56, 384613), (139, 154952), (278, 77476), (556, 38738), (973, 22136), (1112, 19369), (1946, 11068), (2767, 7784), (3892, 5534)]