81990020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{585643}}^1$

素因数の和:585659

約数の個数: 24

約数和(自身を含む): 196776384

約数和(自身を除く): 114786364

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 585643, 1171286, 2342572, 2928215, 4099501, 5856430, 8199002, 11712860, 16398004, 20497505, 40995010, 81990020]

約数ペア:

[(1, 81990020), (2, 40995010), (4, 20497505), (5, 16398004), (7, 11712860), (10, 8199002), (14, 5856430), (20, 4099501), (28, 2928215), (35, 2342572), (70, 1171286), (140, 585643)]