20742813

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:119

約数の個数: 96

約数和(自身を含む): 41000960

約数和(自身を除く): 20258147

約数列:

[1, 3, 7, 9, 13, 19, 21, 31, 39, 43, 57, 63, 91, 93, 117, 129, 133, 171, 217, 247, 273, 279, 301, 387, 399, 403, 559, 589, 651, 741, 817, 819, 903, 1197, 1209, 1333, 1677, 1729, 1767, 1953, 2223, 2451, 2709, 2821, 3627, 3913, 3999, 4123, 5031, 5187, 5301, 5719, 7353, 7657, 8463, 9331, 10621, 11739, 11997, 12369, 15561, 17157, 17329, 22971, 25327, 25389, 27993, 31863, 35217, 37107, 51471, 51987, 53599, 68913, 74347, 75981, 83979, 95589, 121303, 155961, 160797, 177289, 223041, 227943, 329251, 363909, 482391, 531867, 669123, 987753, 1091727, 1595601, 2304757, 2963259, 6914271, 20742813]

約数ペア:

[(1, 20742813), (3, 6914271), (7, 2963259), (9, 2304757), (13, 1595601), (19, 1091727), (21, 987753), (31, 669123), (39, 531867), (43, 482391), (57, 363909), (63, 329251), (91, 227943), (93, 223041), (117, 177289), (129, 160797), (133, 155961), (171, 121303), (217, 95589), (247, 83979), (273, 75981), (279, 74347), (301, 68913), (387, 53599), (399, 51987), (403, 51471), (559, 37107), (589, 35217), (651, 31863), (741, 27993), (817, 25389), (819, 25327), (903, 22971), (1197, 17329), (1209, 17157), (1333, 15561), (1677, 12369), (1729, 11997), (1767, 11739), (1953, 10621), (2223, 9331), (2451, 8463), (2709, 7657), (2821, 7353), (3627, 5719), (3913, 5301), (3999, 5187), (4123, 5031)]