20688472

素因数分解:

$2^3\times 7^1\times {\mathrm{571}}^1\times {\mathrm{647}}^1$

素因数の和:1231

約数の個数: 32

約数和(自身を含む): 44478720

約数和(自身を除く): 23790248

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 571, 647, 1142, 1294, 2284, 2588, 3997, 4529, 4568, 5176, 7994, 9058, 15988, 18116, 31976, 36232, 369437, 738874, 1477748, 2586059, 2955496, 5172118, 10344236, 20688472]

約数ペア:

[(1, 20688472), (2, 10344236), (4, 5172118), (7, 2955496), (8, 2586059), (14, 1477748), (28, 738874), (56, 369437), (571, 36232), (647, 31976), (1142, 18116), (1294, 15988), (2284, 9058), (2588, 7994), (3997, 5176), (4529, 4568)]