21579668

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{311}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 44029440

約数和(自身を除く): 22449772

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 83, 166, 209, 311, 332, 418, 622, 836, 913, 1244, 1577, 1826, 3154, 3421, 3652, 5909, 6308, 6842, 11818, 13684, 17347, 23636, 25813, 34694, 51626, 64999, 69388, 103252, 129998, 259996, 283943, 490447, 567886, 980894, 1135772, 1961788, 5394917, 10789834, 21579668]

約数ペア:

[(1, 21579668), (2, 10789834), (4, 5394917), (11, 1961788), (19, 1135772), (22, 980894), (38, 567886), (44, 490447), (76, 283943), (83, 259996), (166, 129998), (209, 103252), (311, 69388), (332, 64999), (418, 51626), (622, 34694), (836, 25813), (913, 23636), (1244, 17347), (1577, 13684), (1826, 11818), (3154, 6842), (3421, 6308), (3652, 5909)]