21881097

素因数分解:

$3^4\times 7^2\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:212

約数の個数: 60

約数和(自身を含む): 39312900

約数和(自身を除く): 17431803

約数列:

[1, 3, 7, 9, 21, 27, 37, 49, 63, 81, 111, 147, 149, 189, 259, 333, 441, 447, 567, 777, 999, 1043, 1323, 1341, 1813, 2331, 2997, 3129, 3969, 4023, 5439, 5513, 6993, 7301, 9387, 12069, 16317, 16539, 20979, 21903, 28161, 38591, 48951, 49617, 65709, 84483, 115773, 146853, 148851, 197127, 270137, 347319, 446553, 591381, 810411, 1041957, 2431233, 3125871, 7293699, 21881097]

約数ペア:

[(1, 21881097), (3, 7293699), (7, 3125871), (9, 2431233), (21, 1041957), (27, 810411), (37, 591381), (49, 446553), (63, 347319), (81, 270137), (111, 197127), (147, 148851), (149, 146853), (189, 115773), (259, 84483), (333, 65709), (441, 49617), (447, 48951), (567, 38591), (777, 28161), (999, 21903), (1043, 20979), (1323, 16539), (1341, 16317), (1813, 12069), (2331, 9387), (2997, 7301), (3129, 6993), (3969, 5513), (4023, 5439)]