20738907

素因数分解:

$3^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:129

約数の個数: 72

約数和(自身を含む): 37844352

約数和(自身を除く): 17105445

約数列:

[1, 3, 7, 9, 21, 31, 37, 41, 49, 63, 93, 111, 123, 147, 217, 259, 279, 287, 333, 369, 441, 651, 777, 861, 1147, 1271, 1517, 1519, 1813, 1953, 2009, 2331, 2583, 3441, 3813, 4551, 4557, 5439, 6027, 8029, 8897, 10323, 10619, 11439, 13653, 13671, 16317, 18081, 24087, 26691, 31857, 47027, 56203, 62279, 72261, 74333, 80073, 95571, 141081, 168609, 186837, 222999, 329189, 423243, 505827, 560511, 668997, 987567, 2304323, 2962701, 6912969, 20738907]

約数ペア:

[(1, 20738907), (3, 6912969), (7, 2962701), (9, 2304323), (21, 987567), (31, 668997), (37, 560511), (41, 505827), (49, 423243), (63, 329189), (93, 222999), (111, 186837), (123, 168609), (147, 141081), (217, 95571), (259, 80073), (279, 74333), (287, 72261), (333, 62279), (369, 56203), (441, 47027), (651, 31857), (777, 26691), (861, 24087), (1147, 18081), (1271, 16317), (1517, 13671), (1519, 13653), (1813, 11439), (1953, 10619), (2009, 10323), (2331, 8897), (2583, 8029), (3441, 6027), (3813, 5439), (4551, 4557)]