20805080

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4861}}^1$

素因数の和:4979

約数の個数: 32

約数和(自身を含む): 47258640

約数和(自身を除く): 26453560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4861, 9722, 19444, 24305, 38888, 48610, 97220, 194440, 520127, 1040254, 2080508, 2600635, 4161016, 5201270, 10402540, 20805080]

約数ペア:

[(1, 20805080), (2, 10402540), (4, 5201270), (5, 4161016), (8, 2600635), (10, 2080508), (20, 1040254), (40, 520127), (107, 194440), (214, 97220), (428, 48610), (535, 38888), (856, 24305), (1070, 19444), (2140, 9722), (4280, 4861)]