21440000

素因数分解:

$2^9\times 5^4\times {\mathrm{67}}^1$

素因数の和:105

約数の個数: 100

約数和(自身を含む): 54329484

約数和(自身を除く): 32889484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 67, 80, 100, 125, 128, 134, 160, 200, 250, 256, 268, 320, 335, 400, 500, 512, 536, 625, 640, 670, 800, 1000, 1072, 1250, 1280, 1340, 1600, 1675, 2000, 2144, 2500, 2560, 2680, 3200, 3350, 4000, 4288, 5000, 5360, 6400, 6700, 8000, 8375, 8576, 10000, 10720, 12800, 13400, 16000, 16750, 17152, 20000, 21440, 26800, 32000, 33500, 34304, 40000, 41875, 42880, 53600, 64000, 67000, 80000, 83750, 85760, 107200, 134000, 160000, 167500, 171520, 214400, 268000, 320000, 335000, 428800, 536000, 670000, 857600, 1072000, 1340000, 2144000, 2680000, 4288000, 5360000, 10720000, 21440000]

約数ペア:

[(1, 21440000), (2, 10720000), (4, 5360000), (5, 4288000), (8, 2680000), (10, 2144000), (16, 1340000), (20, 1072000), (25, 857600), (32, 670000), (40, 536000), (50, 428800), (64, 335000), (67, 320000), (80, 268000), (100, 214400), (125, 171520), (128, 167500), (134, 160000), (160, 134000), (200, 107200), (250, 85760), (256, 83750), (268, 80000), (320, 67000), (335, 64000), (400, 53600), (500, 42880), (512, 41875), (536, 40000), (625, 34304), (640, 33500), (670, 32000), (800, 26800), (1000, 21440), (1072, 20000), (1250, 17152), (1280, 16750), (1340, 16000), (1600, 13400), (1675, 12800), (2000, 10720), (2144, 10000), (2500, 8576), (2560, 8375), (2680, 8000), (3200, 6700), (3350, 6400), (4000, 5360), (4288, 5000)]