21000688816

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{386383}}^1$

素因数の和:386513

約数の個数: 40

約数和(自身を含む): 42162222080

約数和(自身を除く): 21161533264

約数列:

[1, 2, 4, 8, 16, 43, 79, 86, 158, 172, 316, 344, 632, 688, 1264, 3397, 6794, 13588, 27176, 54352, 386383, 772766, 1545532, 3091064, 6182128, 16614469, 30524257, 33228938, 61048514, 66457876, 122097028, 132915752, 244194056, 265831504, 488388112, 1312543051, 2625086102, 5250172204, 10500344408, 21000688816]

約数ペア:

[(1, 21000688816), (2, 10500344408), (4, 5250172204), (8, 2625086102), (16, 1312543051), (43, 488388112), (79, 265831504), (86, 244194056), (158, 132915752), (172, 122097028), (316, 66457876), (344, 61048514), (632, 33228938), (688, 30524257), (1264, 16614469), (3397, 6182128), (6794, 3091064), (13588, 1545532), (27176, 772766), (54352, 386383)]