12512780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{643}}^1$

素因数の和:798

約数の個数: 48

約数和(自身を含む): 30293760

約数和(自身を除く): 17780980

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 643, 695, 973, 1286, 1390, 1946, 2572, 2780, 3215, 3892, 4501, 4865, 6430, 9002, 9730, 12860, 18004, 19460, 22505, 45010, 89377, 90020, 178754, 357508, 446885, 625639, 893770, 1251278, 1787540, 2502556, 3128195, 6256390, 12512780]

約数ペア:

[(1, 12512780), (2, 6256390), (4, 3128195), (5, 2502556), (7, 1787540), (10, 1251278), (14, 893770), (20, 625639), (28, 446885), (35, 357508), (70, 178754), (139, 90020), (140, 89377), (278, 45010), (556, 22505), (643, 19460), (695, 18004), (973, 12860), (1286, 9730), (1390, 9002), (1946, 6430), (2572, 4865), (2780, 4501), (3215, 3892)]