12840680

素因数分解:

$2^3\times 5^1\times {\mathrm{321017}}^1$

素因数の和:321028

約数の個数: 16

約数和(自身を含む): 28891620

約数和(自身を除く): 16050940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 321017, 642034, 1284068, 1605085, 2568136, 3210170, 6420340, 12840680]

約数ペア:

[(1, 12840680), (2, 6420340), (4, 3210170), (5, 2568136), (8, 1605085), (10, 1284068), (20, 642034), (40, 321017)]