12439720

素因数分解:

$2^3\times 5^1\times {\mathrm{353}}^1\times {\mathrm{881}}^1$

素因数の和:1245

約数の個数: 32

約数和(自身を含む): 28100520

約数和(自身を除く): 15660800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 353, 706, 881, 1412, 1762, 1765, 2824, 3524, 3530, 4405, 7048, 7060, 8810, 14120, 17620, 35240, 310993, 621986, 1243972, 1554965, 2487944, 3109930, 6219860, 12439720]

約数ペア:

[(1, 12439720), (2, 6219860), (4, 3109930), (5, 2487944), (8, 1554965), (10, 1243972), (20, 621986), (40, 310993), (353, 35240), (706, 17620), (881, 14120), (1412, 8810), (1762, 7060), (1765, 7048), (2824, 4405), (3524, 3530)]