20894960

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2441}}^1$

素因数の和:2561

約数の個数: 40

約数和(自身を含む): 49054896

約数和(自身を除く): 28159936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2441, 4280, 4882, 8560, 9764, 12205, 19528, 24410, 39056, 48820, 97640, 195280, 261187, 522374, 1044748, 1305935, 2089496, 2611870, 4178992, 5223740, 10447480, 20894960]

約数ペア:

[(1, 20894960), (2, 10447480), (4, 5223740), (5, 4178992), (8, 2611870), (10, 2089496), (16, 1305935), (20, 1044748), (40, 522374), (80, 261187), (107, 195280), (214, 97640), (428, 48820), (535, 39056), (856, 24410), (1070, 19528), (1712, 12205), (2140, 9764), (2441, 8560), (4280, 4882)]