15920000

素因数分解:

$2^7\times 5^4\times {\mathrm{199}}^1$

素因数の和:233

約数の個数: 80

約数和(自身を含む): 39831000

約数和(自身を除く): 23911000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 199, 200, 250, 320, 398, 400, 500, 625, 640, 796, 800, 995, 1000, 1250, 1592, 1600, 1990, 2000, 2500, 3184, 3200, 3980, 4000, 4975, 5000, 6368, 7960, 8000, 9950, 10000, 12736, 15920, 16000, 19900, 20000, 24875, 25472, 31840, 39800, 40000, 49750, 63680, 79600, 80000, 99500, 124375, 127360, 159200, 199000, 248750, 318400, 398000, 497500, 636800, 796000, 995000, 1592000, 1990000, 3184000, 3980000, 7960000, 15920000]

約数ペア:

[(1, 15920000), (2, 7960000), (4, 3980000), (5, 3184000), (8, 1990000), (10, 1592000), (16, 995000), (20, 796000), (25, 636800), (32, 497500), (40, 398000), (50, 318400), (64, 248750), (80, 199000), (100, 159200), (125, 127360), (128, 124375), (160, 99500), (199, 80000), (200, 79600), (250, 63680), (320, 49750), (398, 40000), (400, 39800), (500, 31840), (625, 25472), (640, 24875), (796, 20000), (800, 19900), (995, 16000), (1000, 15920), (1250, 12736), (1592, 10000), (1600, 9950), (1990, 8000), (2000, 7960), (2500, 6368), (3184, 5000), (3200, 4975), (3980, 4000)]