21000978866

素因数分解:

$2^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{193}}^1\times {\mathrm{6263}}^1$

素因数の和:6555

約数の個数: 64

約数和(自身を含む): 38848025088

約数和(自身を除く): 17847046222

約数列:

[1, 2, 7, 14, 17, 34, 73, 119, 146, 193, 238, 386, 511, 1022, 1241, 1351, 2482, 2702, 3281, 6263, 6562, 8687, 12526, 14089, 17374, 22967, 28178, 43841, 45934, 87682, 98623, 106471, 197246, 212942, 239513, 457199, 479026, 745297, 914398, 1208759, 1490594, 1676591, 2417518, 3200393, 3353182, 6400786, 7772383, 8461313, 15544766, 16922626, 20548903, 41097806, 54406681, 88239407, 108813362, 143842321, 176478814, 287684642, 617675849, 1235351698, 1500069919, 3000139838, 10500489433, 21000978866]

約数ペア:

[(1, 21000978866), (2, 10500489433), (7, 3000139838), (14, 1500069919), (17, 1235351698), (34, 617675849), (73, 287684642), (119, 176478814), (146, 143842321), (193, 108813362), (238, 88239407), (386, 54406681), (511, 41097806), (1022, 20548903), (1241, 16922626), (1351, 15544766), (2482, 8461313), (2702, 7772383), (3281, 6400786), (6263, 3353182), (6562, 3200393), (8687, 2417518), (12526, 1676591), (14089, 1490594), (17374, 1208759), (22967, 914398), (28178, 745297), (43841, 479026), (45934, 457199), (87682, 239513), (98623, 212942), (106471, 197246)]