21084050

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{199}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 42705600

約数和(自身を除く): 21621550

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 130, 163, 199, 325, 326, 398, 650, 815, 995, 1630, 1990, 2119, 2587, 4075, 4238, 4975, 5174, 8150, 9950, 10595, 12935, 21190, 25870, 32437, 52975, 64675, 64874, 105950, 129350, 162185, 324370, 421681, 810925, 843362, 1621850, 2108405, 4216810, 10542025, 21084050]

約数ペア:

[(1, 21084050), (2, 10542025), (5, 4216810), (10, 2108405), (13, 1621850), (25, 843362), (26, 810925), (50, 421681), (65, 324370), (130, 162185), (163, 129350), (199, 105950), (325, 64874), (326, 64675), (398, 52975), (650, 32437), (815, 25870), (995, 21190), (1630, 12935), (1990, 10595), (2119, 9950), (2587, 8150), (4075, 5174), (4238, 4975)]