20748756

素因数分解:

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

素因数の和:170

約数の個数: 72

約数和(自身を含む): 57265600

約数和(自身を除く): 36516844

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 71, 84, 98, 142, 147, 196, 213, 284, 294, 343, 426, 497, 588, 686, 852, 994, 1029, 1372, 1491, 1988, 2058, 2982, 3479, 4116, 5041, 5964, 6958, 10082, 10437, 13916, 15123, 20164, 20874, 24353, 30246, 35287, 41748, 48706, 60492, 70574, 73059, 97412, 105861, 141148, 146118, 211722, 247009, 292236, 423444, 494018, 741027, 988036, 1482054, 1729063, 2964108, 3458126, 5187189, 6916252, 10374378, 20748756]

約数ペア:

[(1, 20748756), (2, 10374378), (3, 6916252), (4, 5187189), (6, 3458126), (7, 2964108), (12, 1729063), (14, 1482054), (21, 988036), (28, 741027), (42, 494018), (49, 423444), (71, 292236), (84, 247009), (98, 211722), (142, 146118), (147, 141148), (196, 105861), (213, 97412), (284, 73059), (294, 70574), (343, 60492), (426, 48706), (497, 41748), (588, 35287), (686, 30246), (852, 24353), (994, 20874), (1029, 20164), (1372, 15123), (1491, 13916), (1988, 10437), (2058, 10082), (2982, 6958), (3479, 5964), (4116, 5041)]