20288000

素因数分解:

$2^9\times 5^3\times {\mathrm{317}}^1$

素因数の和:350

約数の個数: 80

約数和(自身を含む): 50748984

約数和(自身を除く): 30460984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 317, 320, 400, 500, 512, 634, 640, 800, 1000, 1268, 1280, 1585, 1600, 2000, 2536, 2560, 3170, 3200, 4000, 5072, 6340, 6400, 7925, 8000, 10144, 12680, 12800, 15850, 16000, 20288, 25360, 31700, 32000, 39625, 40576, 50720, 63400, 64000, 79250, 81152, 101440, 126800, 158500, 162304, 202880, 253600, 317000, 405760, 507200, 634000, 811520, 1014400, 1268000, 2028800, 2536000, 4057600, 5072000, 10144000, 20288000]

約数ペア:

[(1, 20288000), (2, 10144000), (4, 5072000), (5, 4057600), (8, 2536000), (10, 2028800), (16, 1268000), (20, 1014400), (25, 811520), (32, 634000), (40, 507200), (50, 405760), (64, 317000), (80, 253600), (100, 202880), (125, 162304), (128, 158500), (160, 126800), (200, 101440), (250, 81152), (256, 79250), (317, 64000), (320, 63400), (400, 50720), (500, 40576), (512, 39625), (634, 32000), (640, 31700), (800, 25360), (1000, 20288), (1268, 16000), (1280, 15850), (1585, 12800), (1600, 12680), (2000, 10144), (2536, 8000), (2560, 7925), (3170, 6400), (3200, 6340), (4000, 5072)]