21920000

素因数分解:

$2^8\times 5^4\times {\mathrm{137}}^1$

素因数の和:173

約数の個数: 90

約数和(自身を含む): 55074558

約数和(自身を除く): 33154558

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 137, 160, 200, 250, 256, 274, 320, 400, 500, 548, 625, 640, 685, 800, 1000, 1096, 1250, 1280, 1370, 1600, 2000, 2192, 2500, 2740, 3200, 3425, 4000, 4384, 5000, 5480, 6400, 6850, 8000, 8768, 10000, 10960, 13700, 16000, 17125, 17536, 20000, 21920, 27400, 32000, 34250, 35072, 40000, 43840, 54800, 68500, 80000, 85625, 87680, 109600, 137000, 160000, 171250, 175360, 219200, 274000, 342500, 438400, 548000, 685000, 876800, 1096000, 1370000, 2192000, 2740000, 4384000, 5480000, 10960000, 21920000]

約数ペア:

[(1, 21920000), (2, 10960000), (4, 5480000), (5, 4384000), (8, 2740000), (10, 2192000), (16, 1370000), (20, 1096000), (25, 876800), (32, 685000), (40, 548000), (50, 438400), (64, 342500), (80, 274000), (100, 219200), (125, 175360), (128, 171250), (137, 160000), (160, 137000), (200, 109600), (250, 87680), (256, 85625), (274, 80000), (320, 68500), (400, 54800), (500, 43840), (548, 40000), (625, 35072), (640, 34250), (685, 32000), (800, 27400), (1000, 21920), (1096, 20000), (1250, 17536), (1280, 17125), (1370, 16000), (1600, 13700), (2000, 10960), (2192, 10000), (2500, 8768), (2740, 8000), (3200, 6850), (3425, 6400), (4000, 5480), (4384, 5000)]