20689520

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2417}}^1$

素因数の和:2537

約数の個数: 40

約数和(自身を含む): 48572784

約数和(自身を除く): 27883264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2417, 4280, 4834, 8560, 9668, 12085, 19336, 24170, 38672, 48340, 96680, 193360, 258619, 517238, 1034476, 1293095, 2068952, 2586190, 4137904, 5172380, 10344760, 20689520]

約数ペア:

[(1, 20689520), (2, 10344760), (4, 5172380), (5, 4137904), (8, 2586190), (10, 2068952), (16, 1293095), (20, 1034476), (40, 517238), (80, 258619), (107, 193360), (214, 96680), (428, 48340), (535, 38672), (856, 24170), (1070, 19336), (1712, 12085), (2140, 9668), (2417, 8560), (4280, 4834)]