21380128

素因数分解:

$2^5\times 7^1\times {\mathrm{11}}^1\times {\mathrm{8677}}^1$

素因数の和:8705

約数の個数: 48

約数和(自身を含む): 52484544

約数和(自身を除く): 31104416

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 56, 77, 88, 112, 154, 176, 224, 308, 352, 616, 1232, 2464, 8677, 17354, 34708, 60739, 69416, 95447, 121478, 138832, 190894, 242956, 277664, 381788, 485912, 668129, 763576, 971824, 1336258, 1527152, 1943648, 2672516, 3054304, 5345032, 10690064, 21380128]

約数ペア:

[(1, 21380128), (2, 10690064), (4, 5345032), (7, 3054304), (8, 2672516), (11, 1943648), (14, 1527152), (16, 1336258), (22, 971824), (28, 763576), (32, 668129), (44, 485912), (56, 381788), (77, 277664), (88, 242956), (112, 190894), (154, 138832), (176, 121478), (224, 95447), (308, 69416), (352, 60739), (616, 34708), (1232, 17354), (2464, 8677)]