20671749

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{151}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 15180795

約数列:

[1, 3, 7, 9, 21, 41, 53, 63, 123, 151, 159, 287, 369, 371, 453, 477, 861, 1057, 1113, 1359, 2173, 2583, 3171, 3339, 6191, 6519, 8003, 9513, 15211, 18573, 19557, 24009, 43337, 45633, 55719, 56021, 72027, 130011, 136899, 168063, 328123, 390033, 504189, 984369, 2296861, 2953107, 6890583, 20671749]

約数ペア:

[(1, 20671749), (3, 6890583), (7, 2953107), (9, 2296861), (21, 984369), (41, 504189), (53, 390033), (63, 328123), (123, 168063), (151, 136899), (159, 130011), (287, 72027), (369, 56021), (371, 55719), (453, 45633), (477, 43337), (861, 24009), (1057, 19557), (1113, 18573), (1359, 15211), (2173, 9513), (2583, 8003), (3171, 6519), (3339, 6191)]