28505840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1117}}^1$

素因数の和:1170

約数の個数: 80

約数和(自身を含む): 74861280

約数和(自身を除く): 46355440

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 880, 1117, 1160, 1276, 1595, 2234, 2320, 2552, 3190, 4468, 5104, 5585, 6380, 8936, 11170, 12287, 12760, 17872, 22340, 24574, 25520, 32393, 44680, 49148, 61435, 64786, 89360, 98296, 122870, 129572, 161965, 196592, 245740, 259144, 323930, 356323, 491480, 518288, 647860, 712646, 982960, 1295720, 1425292, 1781615, 2591440, 2850584, 3563230, 5701168, 7126460, 14252920, 28505840]

約数ペア:

[(1, 28505840), (2, 14252920), (4, 7126460), (5, 5701168), (8, 3563230), (10, 2850584), (11, 2591440), (16, 1781615), (20, 1425292), (22, 1295720), (29, 982960), (40, 712646), (44, 647860), (55, 518288), (58, 491480), (80, 356323), (88, 323930), (110, 259144), (116, 245740), (145, 196592), (176, 161965), (220, 129572), (232, 122870), (290, 98296), (319, 89360), (440, 64786), (464, 61435), (580, 49148), (638, 44680), (880, 32393), (1117, 25520), (1160, 24574), (1276, 22340), (1595, 17872), (2234, 12760), (2320, 12287), (2552, 11170), (3190, 8936), (4468, 6380), (5104, 5585)]