20915748

素因数分解:

$2^2\times 3^2\times 7^2\times {\mathrm{71}}^1\times {\mathrm{167}}^1$

素因数の和:262

約数の個数: 108

約数和(自身を含む): 62741952

約数和(自身を除く): 41826204

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 49, 63, 71, 84, 98, 126, 142, 147, 167, 196, 213, 252, 284, 294, 334, 426, 441, 497, 501, 588, 639, 668, 852, 882, 994, 1002, 1169, 1278, 1491, 1503, 1764, 1988, 2004, 2338, 2556, 2982, 3006, 3479, 3507, 4473, 4676, 5964, 6012, 6958, 7014, 8183, 8946, 10437, 10521, 11857, 13916, 14028, 16366, 17892, 20874, 21042, 23714, 24549, 31311, 32732, 35571, 41748, 42084, 47428, 49098, 62622, 71142, 73647, 82999, 98196, 106713, 125244, 142284, 147294, 165998, 213426, 248997, 294588, 331996, 426852, 497994, 580993, 746991, 995988, 1161986, 1493982, 1742979, 2323972, 2987964, 3485958, 5228937, 6971916, 10457874, 20915748]

約数ペア:

[(1, 20915748), (2, 10457874), (3, 6971916), (4, 5228937), (6, 3485958), (7, 2987964), (9, 2323972), (12, 1742979), (14, 1493982), (18, 1161986), (21, 995988), (28, 746991), (36, 580993), (42, 497994), (49, 426852), (63, 331996), (71, 294588), (84, 248997), (98, 213426), (126, 165998), (142, 147294), (147, 142284), (167, 125244), (196, 106713), (213, 98196), (252, 82999), (284, 73647), (294, 71142), (334, 62622), (426, 49098), (441, 47428), (497, 42084), (501, 41748), (588, 35571), (639, 32732), (668, 31311), (852, 24549), (882, 23714), (994, 21042), (1002, 20874), (1169, 17892), (1278, 16366), (1491, 14028), (1503, 13916), (1764, 11857), (1988, 10521), (2004, 10437), (2338, 8946), (2556, 8183), (2982, 7014), (3006, 6958), (3479, 6012), (3507, 5964), (4473, 4676)]