21251768

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{307}}^1\times {\mathrm{509}}^1$

素因数の和:839

約数の個数: 32

約数和(自身を含む): 42411600

約数和(自身を除く): 21159832

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 307, 509, 614, 1018, 1228, 2036, 2456, 4072, 5219, 8653, 10438, 17306, 20876, 34612, 41752, 69224, 156263, 312526, 625052, 1250104, 2656471, 5312942, 10625884, 21251768]

約数ペア:

[(1, 21251768), (2, 10625884), (4, 5312942), (8, 2656471), (17, 1250104), (34, 625052), (68, 312526), (136, 156263), (307, 69224), (509, 41752), (614, 34612), (1018, 20876), (1228, 17306), (2036, 10438), (2456, 8653), (4072, 5219)]