21650020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{154643}}^1$

素因数の和:154659

約数の個数: 24

約数和(自身を含む): 51960384

約数和(自身を除く): 30310364

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 154643, 309286, 618572, 773215, 1082501, 1546430, 2165002, 3092860, 4330004, 5412505, 10825010, 21650020]

約数ペア:

[(1, 21650020), (2, 10825010), (4, 5412505), (5, 4330004), (7, 3092860), (10, 2165002), (14, 1546430), (20, 1082501), (28, 773215), (35, 618572), (70, 309286), (140, 154643)]