20201305

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^2\times {\mathrm{59}}^1$

素因数の和:189

約数の個数: 24

約数和(自身を含む): 26000640

約数和(自身を除く): 5799335

約数列:

[1, 5, 31, 47, 59, 155, 235, 295, 1457, 1829, 2209, 2773, 7285, 9145, 11045, 13865, 68479, 85963, 130331, 342395, 429815, 651655, 4040261, 20201305]

約数ペア:

[(1, 20201305), (5, 4040261), (31, 651655), (47, 429815), (59, 342395), (155, 130331), (235, 85963), (295, 68479), (1457, 13865), (1829, 11045), (2209, 9145), (2773, 7285)]