21987112

素因数分解:

$2^3\times 7^1\times {\mathrm{199}}^1\times {\mathrm{1973}}^1$

素因数の和:2185

約数の個数: 32

約数和(自身を含む): 47376000

約数和(自身を除く): 25388888

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 199, 398, 796, 1393, 1592, 1973, 2786, 3946, 5572, 7892, 11144, 13811, 15784, 27622, 55244, 110488, 392627, 785254, 1570508, 2748389, 3141016, 5496778, 10993556, 21987112]

約数ペア:

[(1, 21987112), (2, 10993556), (4, 5496778), (7, 3141016), (8, 2748389), (14, 1570508), (28, 785254), (56, 392627), (199, 110488), (398, 55244), (796, 27622), (1393, 15784), (1592, 13811), (1973, 11144), (2786, 7892), (3946, 5572)]