21276160

素因数分解:

$2^9\times 5^1\times {\mathrm{8311}}^1$

素因数の和:8334

約数の個数: 40

約数和(自身を含む): 51019056

約数和(自身を除く): 29742896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8311, 16622, 33244, 41555, 66488, 83110, 132976, 166220, 265952, 332440, 531904, 664880, 1063808, 1329760, 2127616, 2659520, 4255232, 5319040, 10638080, 21276160]

約数ペア:

[(1, 21276160), (2, 10638080), (4, 5319040), (5, 4255232), (8, 2659520), (10, 2127616), (16, 1329760), (20, 1063808), (32, 664880), (40, 531904), (64, 332440), (80, 265952), (128, 166220), (160, 132976), (256, 83110), (320, 66488), (512, 41555), (640, 33244), (1280, 16622), (2560, 8311)]