21987378

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{97}}^1\times {\mathrm{257}}^1$

素因数の和:376

約数の個数: 72

約数和(自身を含む): 56206332

約数和(自身を除く): 34218954

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 97, 98, 126, 147, 194, 257, 291, 294, 441, 514, 582, 679, 771, 873, 882, 1358, 1542, 1746, 1799, 2037, 2313, 3598, 4074, 4626, 4753, 5397, 6111, 9506, 10794, 12222, 12593, 14259, 16191, 24929, 25186, 28518, 32382, 37779, 42777, 49858, 74787, 75558, 85554, 113337, 149574, 174503, 224361, 226674, 349006, 448722, 523509, 1047018, 1221521, 1570527, 2443042, 3141054, 3664563, 7329126, 10993689, 21987378]

約数ペア:

[(1, 21987378), (2, 10993689), (3, 7329126), (6, 3664563), (7, 3141054), (9, 2443042), (14, 1570527), (18, 1221521), (21, 1047018), (42, 523509), (49, 448722), (63, 349006), (97, 226674), (98, 224361), (126, 174503), (147, 149574), (194, 113337), (257, 85554), (291, 75558), (294, 74787), (441, 49858), (514, 42777), (582, 37779), (679, 32382), (771, 28518), (873, 25186), (882, 24929), (1358, 16191), (1542, 14259), (1746, 12593), (1799, 12222), (2037, 10794), (2313, 9506), (3598, 6111), (4074, 5397), (4626, 4753)]