28121121

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:267

約数の個数: 64

約数和(自身を含む): 51609600

約数和(自身を除く): 23488479

約数列:

[1, 3, 7, 9, 19, 21, 27, 41, 57, 63, 123, 133, 171, 189, 191, 287, 369, 399, 513, 573, 779, 861, 1107, 1197, 1337, 1719, 2337, 2583, 3591, 3629, 4011, 5157, 5453, 7011, 7749, 7831, 10887, 12033, 16359, 21033, 23493, 25403, 32661, 36099, 49077, 54817, 70479, 76209, 97983, 147231, 148789, 164451, 211437, 228627, 446367, 493353, 685881, 1041523, 1339101, 1480059, 3124569, 4017303, 9373707, 28121121]

約数ペア:

[(1, 28121121), (3, 9373707), (7, 4017303), (9, 3124569), (19, 1480059), (21, 1339101), (27, 1041523), (41, 685881), (57, 493353), (63, 446367), (123, 228627), (133, 211437), (171, 164451), (189, 148789), (191, 147231), (287, 97983), (369, 76209), (399, 70479), (513, 54817), (573, 49077), (779, 36099), (861, 32661), (1107, 25403), (1197, 23493), (1337, 21033), (1719, 16359), (2337, 12033), (2583, 10887), (3591, 7831), (3629, 7749), (4011, 7011), (5157, 5453)]