21168880

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2473}}^1$

素因数の和:2593

約数の個数: 40

約数和(自身を含む): 49697712

約数和(自身を除く): 28528832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2473, 4280, 4946, 8560, 9892, 12365, 19784, 24730, 39568, 49460, 98920, 197840, 264611, 529222, 1058444, 1323055, 2116888, 2646110, 4233776, 5292220, 10584440, 21168880]

約数ペア:

[(1, 21168880), (2, 10584440), (4, 5292220), (5, 4233776), (8, 2646110), (10, 2116888), (16, 1323055), (20, 1058444), (40, 529222), (80, 264611), (107, 197840), (214, 98920), (428, 49460), (535, 39568), (856, 24730), (1070, 19784), (1712, 12365), (2140, 9892), (2473, 8560), (4280, 4946)]