20759680

素因数分解:

$2^7\times 5^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:381

約数の個数: 64

約数和(自身を含む): 50184000

約数和(自身を除く): 29424320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 163, 199, 320, 326, 398, 640, 652, 796, 815, 995, 1304, 1592, 1630, 1990, 2608, 3184, 3260, 3980, 5216, 6368, 6520, 7960, 10432, 12736, 13040, 15920, 20864, 25472, 26080, 31840, 32437, 52160, 63680, 64874, 104320, 127360, 129748, 162185, 259496, 324370, 518992, 648740, 1037984, 1297480, 2075968, 2594960, 4151936, 5189920, 10379840, 20759680]

約数ペア:

[(1, 20759680), (2, 10379840), (4, 5189920), (5, 4151936), (8, 2594960), (10, 2075968), (16, 1297480), (20, 1037984), (32, 648740), (40, 518992), (64, 324370), (80, 259496), (128, 162185), (160, 129748), (163, 127360), (199, 104320), (320, 64874), (326, 63680), (398, 52160), (640, 32437), (652, 31840), (796, 26080), (815, 25472), (995, 20864), (1304, 15920), (1592, 13040), (1630, 12736), (1990, 10432), (2608, 7960), (3184, 6520), (3260, 6368), (3980, 5216)]