20590840

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{2003}}^1$

素因数の和:2271

約数の個数: 32

約数和(自身を含む): 46532880

約数和(自身を除く): 25942040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2003, 2056, 2570, 4006, 5140, 8012, 10015, 10280, 16024, 20030, 40060, 80120, 514771, 1029542, 2059084, 2573855, 4118168, 5147710, 10295420, 20590840]

約数ペア:

[(1, 20590840), (2, 10295420), (4, 5147710), (5, 4118168), (8, 2573855), (10, 2059084), (20, 1029542), (40, 514771), (257, 80120), (514, 40060), (1028, 20030), (1285, 16024), (2003, 10280), (2056, 10015), (2570, 8012), (4006, 5140)]