20485556

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{337}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 44518656

約数和(自身を除く): 24033100

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 167, 182, 334, 337, 364, 668, 674, 1169, 1348, 2171, 2338, 2359, 4342, 4381, 4676, 4718, 8684, 8762, 9436, 15197, 17524, 30394, 30667, 56279, 60788, 61334, 112558, 122668, 225116, 393953, 731627, 787906, 1463254, 1575812, 2926508, 5121389, 10242778, 20485556]

約数ペア:

[(1, 20485556), (2, 10242778), (4, 5121389), (7, 2926508), (13, 1575812), (14, 1463254), (26, 787906), (28, 731627), (52, 393953), (91, 225116), (167, 122668), (182, 112558), (334, 61334), (337, 60788), (364, 56279), (668, 30667), (674, 30394), (1169, 17524), (1348, 15197), (2171, 9436), (2338, 8762), (2359, 8684), (4342, 4718), (4381, 4676)]