19888000

素因数分解:

$2^7\times 5^3\times {\mathrm{11}}^1\times {\mathrm{113}}^1$

素因数の和:153

約数の個数: 128

約数和(自身を含む): 54419040

約数和(自身を除く): 34531040

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 44, 50, 55, 64, 80, 88, 100, 110, 113, 125, 128, 160, 176, 200, 220, 226, 250, 275, 320, 352, 400, 440, 452, 500, 550, 565, 640, 704, 800, 880, 904, 1000, 1100, 1130, 1243, 1375, 1408, 1600, 1760, 1808, 2000, 2200, 2260, 2486, 2750, 2825, 3200, 3520, 3616, 4000, 4400, 4520, 4972, 5500, 5650, 6215, 7040, 7232, 8000, 8800, 9040, 9944, 11000, 11300, 12430, 14125, 14464, 16000, 17600, 18080, 19888, 22000, 22600, 24860, 28250, 31075, 35200, 36160, 39776, 44000, 45200, 49720, 56500, 62150, 72320, 79552, 88000, 90400, 99440, 113000, 124300, 155375, 159104, 176000, 180800, 198880, 226000, 248600, 310750, 361600, 397760, 452000, 497200, 621500, 795520, 904000, 994400, 1243000, 1808000, 1988800, 2486000, 3977600, 4972000, 9944000, 19888000]

約数ペア:

[(1, 19888000), (2, 9944000), (4, 4972000), (5, 3977600), (8, 2486000), (10, 1988800), (11, 1808000), (16, 1243000), (20, 994400), (22, 904000), (25, 795520), (32, 621500), (40, 497200), (44, 452000), (50, 397760), (55, 361600), (64, 310750), (80, 248600), (88, 226000), (100, 198880), (110, 180800), (113, 176000), (125, 159104), (128, 155375), (160, 124300), (176, 113000), (200, 99440), (220, 90400), (226, 88000), (250, 79552), (275, 72320), (320, 62150), (352, 56500), (400, 49720), (440, 45200), (452, 44000), (500, 39776), (550, 36160), (565, 35200), (640, 31075), (704, 28250), (800, 24860), (880, 22600), (904, 22000), (1000, 19888), (1100, 18080), (1130, 17600), (1243, 16000), (1375, 14464), (1408, 14125), (1600, 12430), (1760, 11300), (1808, 11000), (2000, 9944), (2200, 9040), (2260, 8800), (2486, 8000), (2750, 7232), (2825, 7040), (3200, 6215), (3520, 5650), (3616, 5500), (4000, 4972), (4400, 4520)]