19720488

素因数分解:

$2^3\times 3^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:346

約数の個数: 64

約数和(自身を含む): 51226560

約数和(自身を除く): 31506072

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 43, 86, 97, 129, 172, 194, 197, 258, 291, 344, 388, 394, 516, 582, 591, 776, 788, 1032, 1164, 1182, 1576, 2328, 2364, 4171, 4728, 8342, 8471, 12513, 16684, 16942, 19109, 25026, 25413, 33368, 33884, 38218, 50052, 50826, 57327, 67768, 76436, 100104, 101652, 114654, 152872, 203304, 229308, 458616, 821687, 1643374, 2465061, 3286748, 4930122, 6573496, 9860244, 19720488]

約数ペア:

[(1, 19720488), (2, 9860244), (3, 6573496), (4, 4930122), (6, 3286748), (8, 2465061), (12, 1643374), (24, 821687), (43, 458616), (86, 229308), (97, 203304), (129, 152872), (172, 114654), (194, 101652), (197, 100104), (258, 76436), (291, 67768), (344, 57327), (388, 50826), (394, 50052), (516, 38218), (582, 33884), (591, 33368), (776, 25413), (788, 25026), (1032, 19109), (1164, 16942), (1182, 16684), (1576, 12513), (2328, 8471), (2364, 8342), (4171, 4728)]