21891856

素因数分解:

$2^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2753}}^1$

素因数の和:2839

約数の個数: 40

約数和(自身を含む): 49175424

約数和(自身を除く): 27283568

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 71, 112, 142, 284, 497, 568, 994, 1136, 1988, 2753, 3976, 5506, 7952, 11012, 19271, 22024, 38542, 44048, 77084, 154168, 195463, 308336, 390926, 781852, 1368241, 1563704, 2736482, 3127408, 5472964, 10945928, 21891856]

約数ペア:

[(1, 21891856), (2, 10945928), (4, 5472964), (7, 3127408), (8, 2736482), (14, 1563704), (16, 1368241), (28, 781852), (56, 390926), (71, 308336), (112, 195463), (142, 154168), (284, 77084), (497, 44048), (568, 38542), (994, 22024), (1136, 19271), (1988, 11012), (2753, 7952), (3976, 5506)]