21390828

素因数分解:

$2^2\times 3^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:191

約数の個数: 96

約数和(自身を含む): 56899584

約数和(自身を除く): 35508756

約数列:

[1, 2, 3, 4, 6, 12, 17, 23, 34, 46, 47, 51, 68, 69, 92, 94, 97, 102, 138, 141, 188, 194, 204, 276, 282, 291, 388, 391, 564, 582, 782, 799, 1081, 1164, 1173, 1564, 1598, 1649, 2162, 2231, 2346, 2397, 3196, 3243, 3298, 4324, 4462, 4559, 4692, 4794, 4947, 6486, 6596, 6693, 8924, 9118, 9588, 9894, 12972, 13386, 13677, 18236, 18377, 19788, 26772, 27354, 36754, 37927, 54708, 55131, 73508, 75854, 77503, 104857, 110262, 113781, 151708, 155006, 209714, 220524, 227562, 232509, 310012, 314571, 419428, 455124, 465018, 629142, 930036, 1258284, 1782569, 3565138, 5347707, 7130276, 10695414, 21390828]

約数ペア:

[(1, 21390828), (2, 10695414), (3, 7130276), (4, 5347707), (6, 3565138), (12, 1782569), (17, 1258284), (23, 930036), (34, 629142), (46, 465018), (47, 455124), (51, 419428), (68, 314571), (69, 310012), (92, 232509), (94, 227562), (97, 220524), (102, 209714), (138, 155006), (141, 151708), (188, 113781), (194, 110262), (204, 104857), (276, 77503), (282, 75854), (291, 73508), (388, 55131), (391, 54708), (564, 37927), (582, 36754), (782, 27354), (799, 26772), (1081, 19788), (1164, 18377), (1173, 18236), (1564, 13677), (1598, 13386), (1649, 12972), (2162, 9894), (2231, 9588), (2346, 9118), (2397, 8924), (3196, 6693), (3243, 6596), (3298, 6486), (4324, 4947), (4462, 4794), (4559, 4692)]