20761600

素因数分解:

$2^{10}\times 5^2\times {\mathrm{811}}^1$

素因数の和:841

約数の個数: 66

約数和(自身を含む): 51527084

約数和(自身を除く): 30765484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 811, 1024, 1280, 1600, 1622, 2560, 3200, 3244, 4055, 5120, 6400, 6488, 8110, 12800, 12976, 16220, 20275, 25600, 25952, 32440, 40550, 51904, 64880, 81100, 103808, 129760, 162200, 207616, 259520, 324400, 415232, 519040, 648800, 830464, 1038080, 1297600, 2076160, 2595200, 4152320, 5190400, 10380800, 20761600]

約数ペア:

[(1, 20761600), (2, 10380800), (4, 5190400), (5, 4152320), (8, 2595200), (10, 2076160), (16, 1297600), (20, 1038080), (25, 830464), (32, 648800), (40, 519040), (50, 415232), (64, 324400), (80, 259520), (100, 207616), (128, 162200), (160, 129760), (200, 103808), (256, 81100), (320, 64880), (400, 51904), (512, 40550), (640, 32440), (800, 25952), (811, 25600), (1024, 20275), (1280, 16220), (1600, 12976), (1622, 12800), (2560, 8110), (3200, 6488), (3244, 6400), (4055, 5120)]