21855078

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{349}}^1$

素因数の和:442

約数の個数: 72

約数和(自身を含む): 56019600

約数和(自身を除く): 34164522

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 71, 98, 126, 142, 147, 213, 294, 349, 426, 441, 497, 639, 698, 882, 994, 1047, 1278, 1491, 2094, 2443, 2982, 3141, 3479, 4473, 4886, 6282, 6958, 7329, 8946, 10437, 14658, 17101, 20874, 21987, 24779, 31311, 34202, 43974, 49558, 51303, 62622, 74337, 102606, 148674, 153909, 173453, 223011, 307818, 346906, 446022, 520359, 1040718, 1214171, 1561077, 2428342, 3122154, 3642513, 7285026, 10927539, 21855078]

約数ペア:

[(1, 21855078), (2, 10927539), (3, 7285026), (6, 3642513), (7, 3122154), (9, 2428342), (14, 1561077), (18, 1214171), (21, 1040718), (42, 520359), (49, 446022), (63, 346906), (71, 307818), (98, 223011), (126, 173453), (142, 153909), (147, 148674), (213, 102606), (294, 74337), (349, 62622), (426, 51303), (441, 49558), (497, 43974), (639, 34202), (698, 31311), (882, 24779), (994, 21987), (1047, 20874), (1278, 17101), (1491, 14658), (2094, 10437), (2443, 8946), (2982, 7329), (3141, 6958), (3479, 6282), (4473, 4886)]