1999984880

素因数分解:

$2^4\times 5^1\times {\mathrm{24999811}}^1$

素因数の和:24999824

約数の個数: 20

約数和(自身を含む): 4649965032

約数和(自身を除く): 2649980152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 24999811, 49999622, 99999244, 124999055, 199998488, 249998110, 399996976, 499996220, 999992440, 1999984880]

約数ペア:

[(1, 1999984880), (2, 999992440), (4, 499996220), (5, 399996976), (8, 249998110), (10, 199998488), (16, 124999055), (20, 99999244), (40, 49999622), (80, 24999811)]