20628800

素因数分解:

$2^6\times 5^2\times {\mathrm{12893}}^1$

素因数の和:12915

約数の個数: 42

約数和(自身を含む): 50763678

約数和(自身を除く): 30134878

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 12893, 25786, 51572, 64465, 103144, 128930, 206288, 257860, 322325, 412576, 515720, 644650, 825152, 1031440, 1289300, 2062880, 2578600, 4125760, 5157200, 10314400, 20628800]

約数ペア:

[(1, 20628800), (2, 10314400), (4, 5157200), (5, 4125760), (8, 2578600), (10, 2062880), (16, 1289300), (20, 1031440), (25, 825152), (32, 644650), (40, 515720), (50, 412576), (64, 322325), (80, 257860), (100, 206288), (160, 128930), (200, 103144), (320, 64465), (400, 51572), (800, 25786), (1600, 12893)]